31097429 has 8 divisors (see below), whose sum is σ = 34114080. Its totient is φ = 28112400.

The previous prime is 31097413. The next prime is 31097431. The reversal of 31097429 is 92479013.

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

It is a cyclic number.

It is not a de Polignac number, because 31097429 - 2⁴ = 31097413 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31097459) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5819 + ... + 9800.

It is an arithmetic number, because the mean of its divisors is an integer number (4264260).

Almost surely, 2^31097429 is an apocalyptic number.

It is an amenable number.

31097429 is a deficient number, since it is larger than the sum of its proper divisors (3016651).

31097429 is a wasteful number, since it uses less digits than its factorization.

31097429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15811.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 31097429 is about 5576.5068815523. The cubic root of 31097429 is about 314.4668195369.

The spelling of 31097429 in words is "thirty-one million, ninety-seven thousand, four hundred twenty-nine".