32139657 has 24 divisors (see below), whose sum is σ = 51081888. Its totient is φ = 19471320.

The previous prime is 32139623. The next prime is 32139683. The reversal of 32139657 is 75693123.

It is not a de Polignac number, because 32139657 - 2⁶ = 32139593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (32139607) 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 23 ways as a sum of consecutive naturals, for example, 10638 + ... + 13320.

It is an arithmetic number, because the mean of its divisors is an integer number (2128412).

Almost surely, 2^32139657 is an apocalyptic number.

It is an amenable number.

32139657 is a deficient number, since it is larger than the sum of its proper divisors (18942231).

32139657 is a wasteful number, since it uses less digits than its factorization.

32139657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2722 (or 2697 counting only the distinct ones).

The product of its digits is 34020, while the sum is 36.

The square root of 32139657 is about 5669.1848620415. The cubic root of 32139657 is about 317.9413977689.

The spelling of 32139657 in words is "thirty-two million, one hundred thirty-nine thousand, six hundred fifty-seven".