102432139 has 2 divisors, whose sum is σ = 102432140. Its totient is φ = 102432138.

The previous prime is 102432073. The next prime is 102432167. The reversal of 102432139 is 931234201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 102432139 - 2¹⁹ = 101907851 is a prime.

It is not a weakly prime, because it can be changed into another prime (102412139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51216069 + 51216070.

It is an arithmetic number, because the mean of its divisors is an integer number (51216070).

Almost surely, 2^102432139 is an apocalyptic number.

102432139 is a deficient number, since it is larger than the sum of its proper divisors (1).

102432139 is an equidigital number, since it uses as much as digits as its factorization.

102432139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 102432139 is about 10120.8763948583. The cubic root of 102432139 is about 467.8917783100.

The spelling of 102432139 in words is "one hundred two million, four hundred thirty-two thousand, one hundred thirty-nine".