31097393 has 8 divisors (see below), whose sum is σ = 32073216. Its totient is φ = 30132000.

The previous prime is 31097377. The next prime is 31097399. The reversal of 31097393 is 39379013.

It is a happy number.

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 31097393 - 2⁴ = 31097377 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31097399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3680 + ... + 8702.

It is an arithmetic number, because the mean of its divisors is an integer number (4009152).

Almost surely, 2^31097393 is an apocalyptic number.

It is an amenable number.

31097393 is a deficient number, since it is larger than the sum of its proper divisors (975823).

31097393 is a wasteful number, since it uses less digits than its factorization.

31097393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5215.

The product of its (nonzero) digits is 15309, while the sum is 35.

The square root of 31097393 is about 5576.5036537243. The cubic root of 31097393 is about 314.4666981891.

The spelling of 31097393 in words is "thirty-one million, ninety-seven thousand, three hundred ninety-three".