31129794 has 12 divisors (see below), whose sum is σ = 67447926. Its totient is φ = 10376592.

The previous prime is 31129739. The next prime is 31129799. The reversal of 31129794 is 49792113.

It can be written as a sum of positive squares in only one way, i.e., 26656569 + 4473225 = 5163^2 + 2115^2 .

It is not an unprimeable number, because it can be changed into a prime (31129799) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 864699 + ... + 864734.

Almost surely, 2^31129794 is an apocalyptic number.

31129794 is an abundant number, since it is smaller than the sum of its proper divisors (36318132).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31129794 is a wasteful number, since it uses less digits than its factorization.

31129794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1729441 (or 1729438 counting only the distinct ones).

The product of its digits is 13608, while the sum is 36.

The square root of 31129794 is about 5579.4080331161. The cubic root of 31129794 is about 314.5758766747.

The spelling of 31129794 in words is "thirty-one million, one hundred twenty-nine thousand, seven hundred ninety-four".