31489065 has 12 divisors (see below), whose sum is σ = 54581124. Its totient is φ = 16794144.

The previous prime is 31489063. The next prime is 31489069. The reversal of 31489065 is 56098413.

It can be written as a sum of positive squares in 2 ways, for example, as 3229209 + 28259856 = 1797^2 + 5316^2 .

It is not a de Polignac number, because 31489065 - 2¹ = 31489063 is a prime.

It is a super-2 number, since 2×31489065² = 1983122429148450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31489063) 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, 349834 + ... + 349923.

It is an arithmetic number, because the mean of its divisors is an integer number (4548427).

Almost surely, 2^31489065 is an apocalyptic number.

It is an amenable number.

31489065 is a deficient number, since it is larger than the sum of its proper divisors (23092059).

31489065 is a wasteful number, since it uses less digits than its factorization.

31489065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699768 (or 699765 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 31489065 is about 5611.5118283757. The cubic root of 31489065 is about 315.7814310013.

The spelling of 31489065 in words is "thirty-one million, four hundred eighty-nine thousand, sixty-five".