31491094930 has 8 divisors (see below), whose sum is σ = 56683970892. Its totient is φ = 12596437968.

The previous prime is 31491094909. The next prime is 31491094939. The reversal of 31491094930 is 3949019413.

It can be written as a sum of positive squares in 2 ways, for example, as 29752455121 + 1738639809 = 172489^2 + 41697^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (31491094939) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1574554737 + ... + 1574554756.

Almost surely, 2^31491094930 is an apocalyptic number.

31491094930 is a deficient number, since it is larger than the sum of its proper divisors (25192875962).

31491094930 is a wasteful number, since it uses less digits than its factorization.

31491094930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3149109500.

The product of its (nonzero) digits is 104976, while the sum is 43.

The spelling of 31491094930 in words is "thirty-one billion, four hundred ninety-one million, ninety-four thousand, nine hundred thirty".