31734989 has 24 divisors (see below), whose sum is σ = 38456352. Its totient is φ = 25945920.

The previous prime is 31734977. The next prime is 31734991. The reversal of 31734989 is 98943713.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-31734989 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 (31734929) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 79739 + ... + 80135.

It is an arithmetic number, because the mean of its divisors is an integer number (1602348).

Almost surely, 2^31734989 is an apocalyptic number.

It is an amenable number.

31734989 is a deficient number, since it is larger than the sum of its proper divisors (6721363).

31734989 is a wasteful number, since it uses less digits than its factorization.

31734989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477 (or 464 counting only the distinct ones).

The product of its digits is 163296, while the sum is 44.

The square root of 31734989 is about 5633.3816664593. The cubic root of 31734989 is about 316.6013657902.

It can be divided in two parts, 31734 and 989, that added together give a palindrome (32723).

The spelling of 31734989 in words is "thirty-one million, seven hundred thirty-four thousand, nine hundred eighty-nine".