1078865197 has 4 divisors (see below), whose sum is σ = 1078933696. Its totient is φ = 1078796700.

The previous prime is 1078865189. The next prime is 1078865243. The reversal of 1078865197 is 7915688701.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1078865197 - 2³ = 1078865189 is a prime.

It is a super-2 number, since 2×1078865197² = 2327900226595697618, 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 (1078865897) 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, 2572 + ... + 46522.

It is an arithmetic number, because the mean of its divisors is an integer number (269733424).

Almost surely, 2^1078865197 is an apocalyptic number.

It is an amenable number.

1078865197 is a deficient number, since it is larger than the sum of its proper divisors (68499).

1078865197 is an equidigital number, since it uses as much as digits as its factorization.

1078865197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68498.

The product of its (nonzero) digits is 846720, while the sum is 52.

The square root of 1078865197 is about 32846.0834347111. The cubic root of 1078865197 is about 1025.6260928426.

The spelling of 1078865197 in words is "one billion, seventy-eight million, eight hundred sixty-five thousand, one hundred ninety-seven".