31074990961 has 9 divisors (see below), whose sum is σ = 36149894361. Its totient is φ = 26634648852.

The previous prime is 31074990883. The next prime is 31074990967. The reversal of 31074990961 is 16909947013.

The square root of 31074990961 is 176281.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 31074990961 - 2⁷ = 31074990833 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is not an unprimeable number, because it can be changed into a prime (31074990967) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1221376 + ... + 1246558.

It is an arithmetic number, because the mean of its divisors is an integer number (4016654929).

Almost surely, 2^31074990961 is an apocalyptic number.

31074990961 is the 176281-st square number.

31074990961 is the 88141-st centered octagonal number.

It is an amenable number.

31074990961 is a deficient number, since it is larger than the sum of its proper divisors (5074903400).

31074990961 is an frugal number, since it uses more digits than its factorization.

31074990961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50380 (or 25190 counting only the distinct ones).

The product of its (nonzero) digits is 367416, while the sum is 49.

Multiplying 31074990961 by its sum of digits (49), we get a square (1522674557089 = 1233967²).

31074990961 divided by its sum of digits (49) gives a square (634183489 = 25183²).

The spelling of 31074990961 in words is "thirty-one billion, seventy-four million, nine hundred ninety thousand, nine hundred sixty-one".