88638139 has 2 divisors, whose sum is σ = 88638140. Its totient is φ = 88638138.

The previous prime is 88638127. The next prime is 88638149. The reversal of 88638139 is 93183688.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 88638139 - 2¹¹ = 88636091 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (88638149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44319069 + 44319070.

It is an arithmetic number, because the mean of its divisors is an integer number (44319070).

Almost surely, 2^88638139 is an apocalyptic number.

88638139 is a deficient number, since it is larger than the sum of its proper divisors (1).

88638139 is an equidigital number, since it uses as much as digits as its factorization.

88638139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 248832, while the sum is 46.

The square root of 88638139 is about 9414.7830033411. The cubic root of 88638139 is about 445.8685875714.

The spelling of 88638139 in words is "eighty-eight million, six hundred thirty-eight thousand, one hundred thirty-nine".