31665089 has 8 divisors (see below), whose sum is σ = 33139392. Its totient is φ = 30198960.

The previous prime is 31665083. The next prime is 31665091. The reversal of 31665089 is 98056613.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31665089 - 2¹⁶ = 31599553 is a prime.

It is a super-2 number, since 2×31665089² = 2005355722755842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31665083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6734 + ... + 10424.

It is an arithmetic number, because the mean of its divisors is an integer number (4142424).

Almost surely, 2^31665089 is an apocalyptic number.

It is an amenable number.

31665089 is a deficient number, since it is larger than the sum of its proper divisors (1474303).

31665089 is a wasteful number, since it uses less digits than its factorization.

31665089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4087.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 31665089 is about 5627.1741576034. The cubic root of 31665089 is about 316.3687444852.

The spelling of 31665089 in words is "thirty-one million, six hundred sixty-five thousand, eighty-nine".