31754989 has 6 divisors (see below), whose sum is σ = 36939534. Its totient is φ = 27218520.

The previous prime is 31754981. The next prime is 31755001. The reversal of 31754989 is 98945713.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 31753225 + 1764 = 5635^2 + 42^2 .

It is not a de Polignac number, because 31754989 - 2³ = 31754981 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 (31754981) 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, 323982 + ... + 324079.

It is an arithmetic number, because the mean of its divisors is an integer number (6156589).

Almost surely, 2^31754989 is an apocalyptic number.

It is an amenable number.

31754989 is a deficient number, since it is larger than the sum of its proper divisors (5184545).

31754989 is an equidigital number, since it uses as much as digits as its factorization.

31754989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648075 (or 648068 counting only the distinct ones).

The product of its digits is 272160, while the sum is 46.

The square root of 31754989 is about 5635.1565195654. The cubic root of 31754989 is about 316.6678612451.

The spelling of 31754989 in words is "thirty-one million, seven hundred fifty-four thousand, nine hundred eighty-nine".