32400139 has 2 divisors, whose sum is σ = 32400140. Its totient is φ = 32400138.

The previous prime is 32400131. The next prime is 32400157. The reversal of 32400139 is 93100423.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 32400139 - 2³ = 32400131 is a prime.

It is not a weakly prime, because it can be changed into another prime (32400131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16200069 + 16200070.

It is an arithmetic number, because the mean of its divisors is an integer number (16200070).

Almost surely, 2^32400139 is an apocalyptic number.

32400139 is a deficient number, since it is larger than the sum of its proper divisors (1).

32400139 is an equidigital number, since it uses as much as digits as its factorization.

32400139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 32400139 is about 5692.1119981954. Note that the first 3 decimals coincide. The cubic root of 32400139 is about 318.7980266478.

The spelling of 32400139 in words is "thirty-two million, four hundred thousand, one hundred thirty-nine".