1208845997 has 4 divisors (see below), whose sum is σ = 1214920800. Its totient is φ = 1202771196.

The previous prime is 1208845973. The next prime is 1208846021. The reversal of 1208845997 is 7995488021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (1208845973) and next prime (1208846021).

It is a cyclic number.

It is not a de Polignac number, because 1208845997 - 2⁶ = 1208845933 is a prime.

It is a super-2 number, since 2×1208845997² = 2922617288925848018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1208845697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3037103 + ... + 3037500.

It is an arithmetic number, because the mean of its divisors is an integer number (303730200).

Almost surely, 2^1208845997 is an apocalyptic number.

It is an amenable number.

1208845997 is a deficient number, since it is larger than the sum of its proper divisors (6074803).

1208845997 is an equidigital number, since it uses as much as digits as its factorization.

1208845997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6074802.

The product of its (nonzero) digits is 1451520, while the sum is 53.

The square root of 1208845997 is about 34768.4626781225. The cubic root of 1208845997 is about 1065.2633664310.

It can be divided in two parts, 12088 and 45997, that added together give a palindrome (58085).

The spelling of 1208845997 in words is "one billion, two hundred eight million, eight hundred forty-five thousand, nine hundred ninety-seven".