32139857 has 2 divisors, whose sum is σ = 32139858. Its totient is φ = 32139856.

The previous prime is 32139847. The next prime is 32139881. The reversal of 32139857 is 75893123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31460881 + 678976 = 5609^2 + 824^2 .

It is a cyclic number.

It is not a de Polignac number, because 32139857 - 2¹⁰ = 32138833 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 32139857.

It is not a weakly prime, because it can be changed into another prime (32139847) 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 as a sum of consecutive naturals, namely, 16069928 + 16069929.

It is an arithmetic number, because the mean of its divisors is an integer number (16069929).

Almost surely, 2^32139857 is an apocalyptic number.

It is an amenable number.

32139857 is a deficient number, since it is larger than the sum of its proper divisors (1).

32139857 is an equidigital number, since it uses as much as digits as its factorization.

32139857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45360, while the sum is 38.

The square root of 32139857 is about 5669.2025012342. The cubic root of 32139857 is about 317.9420572672.

The spelling of 32139857 in words is "thirty-two million, one hundred thirty-nine thousand, eight hundred fifty-seven".