31453397 has 4 divisors (see below), whose sum is σ = 32820960. Its totient is φ = 30085836.

The previous prime is 31453393. The next prime is 31453421. The reversal of 31453397 is 79335413.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31453397 - 2² = 31453393 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31453391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 683747 + ... + 683792.

It is an arithmetic number, because the mean of its divisors is an integer number (8205240).

Almost surely, 2^31453397 is an apocalyptic number.

It is an amenable number.

31453397 is a deficient number, since it is larger than the sum of its proper divisors (1367563).

31453397 is a wasteful number, since it uses less digits than its factorization.

31453397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1367562.

The product of its digits is 34020, while the sum is 35.

The square root of 31453397 is about 5608.3328182268. The cubic root of 31453397 is about 315.6621562897.

The spelling of 31453397 in words is "thirty-one million, four hundred fifty-three thousand, three hundred ninety-seven".