32131987 has 4 divisors (see below), whose sum is σ = 32915736. Its totient is φ = 31348240.

The previous prime is 32131949. The next prime is 32131997. The reversal of 32131987 is 78913123.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78913123 = 1049 ⋅75227.

It is a cyclic number.

It is not a de Polignac number, because 32131987 - 2⁷ = 32131859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (32131997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 391813 + ... + 391894.

It is an arithmetic number, because the mean of its divisors is an integer number (8228934).

Almost surely, 2^32131987 is an apocalyptic number.

32131987 is a deficient number, since it is larger than the sum of its proper divisors (783749).

32131987 is an equidigital number, since it uses as much as digits as its factorization.

32131987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 783748.

The product of its digits is 9072, while the sum is 34.

The square root of 32131987 is about 5668.5083575840. The cubic root of 32131987 is about 317.9161039444.

The spelling of 32131987 in words is "thirty-two million, one hundred thirty-one thousand, nine hundred eighty-seven".