1203670981 has 4 divisors (see below), whose sum is σ = 1211642464. Its totient is φ = 1195699500.

The previous prime is 1203670973. The next prime is 1203670997. The reversal of 1203670981 is 1890763021.

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 a cyclic number.

It is not a de Polignac number, because 1203670981 - 2³ = 1203670973 is a prime.

It is a super-2 number, since 2×1203670981² = 2897647661003004722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1203670981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1203670901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3985515 + ... + 3985816.

It is an arithmetic number, because the mean of its divisors is an integer number (302910616).

Almost surely, 2^1203670981 is an apocalyptic number.

It is an amenable number.

1203670981 is a deficient number, since it is larger than the sum of its proper divisors (7971483).

1203670981 is an equidigital number, since it uses as much as digits as its factorization.

1203670981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7971482.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 1203670981 is about 34693.9617368787. The cubic root of 1203670981 is about 1063.7410770294.

The spelling of 1203670981 in words is "one billion, two hundred three million, six hundred seventy thousand, nine hundred eighty-one".