31489087 has 16 divisors (see below), whose sum is σ = 37433344. Its totient is φ = 25947000.

The previous prime is 31489079. The next prime is 31489091. The reversal of 31489087 is 78098413.

It is not a de Polignac number, because 31489087 - 2³ = 31489079 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31489027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 208462 + ... + 208612.

It is an arithmetic number, because the mean of its divisors is an integer number (2339584).

Almost surely, 2^31489087 is an apocalyptic number.

31489087 is a deficient number, since it is larger than the sum of its proper divisors (5944257).

31489087 is an frugal number, since it uses more digits than its factorization.

31489087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251 (or 189 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 31489087 is about 5611.5137886314. The cubic root of 31489087 is about 315.7815045421.

It can be divided in two parts, 314 and 89087, that added together give a square (89401 = 299²).

The spelling of 31489087 in words is "thirty-one million, four hundred eighty-nine thousand, eighty-seven".