31404897 has 12 divisors (see below), whose sum is σ = 46589140. Its totient is φ = 20370528.

The previous prime is 31404889. The next prime is 31404907. The reversal of 31404897 is 79840413.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 28132416 + 3272481 = 5304^2 + 1809^2 .

It is not a de Polignac number, because 31404897 - 2³ = 31404889 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 (31404887) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46822 + ... + 47487.

Almost surely, 2^31404897 is an apocalyptic number.

31404897 is a gapful number since it is divisible by the number (37) formed by its first and last digit.

It is an amenable number.

31404897 is a deficient number, since it is larger than the sum of its proper divisors (15184243).

31404897 is a wasteful number, since it uses less digits than its factorization.

31404897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94352 (or 94349 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 31404897 is about 5604.0072269761. The cubic root of 31404897 is about 315.4998262846.

The spelling of 31404897 in words is "thirty-one million, four hundred four thousand, eight hundred ninety-seven".