88139961 has 64 divisors (see below), whose sum is σ = 166387200. Its totient is φ = 44851968.

The previous prime is 88139959. The next prime is 88139963. The reversal of 88139961 is 16993188.

It is an interprime number because it is at equal distance from previous prime (88139959) and next prime (88139963).

It is not a de Polignac number, because 88139961 - 2¹ = 88139959 is a prime.

It is not an unprimeable number, because it can be changed into a prime (88139963) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 70635 + ... + 71871.

It is an arithmetic number, because the mean of its divisors is an integer number (2599800).

Almost surely, 2^88139961 is an apocalyptic number.

It is an amenable number.

88139961 is a deficient number, since it is larger than the sum of its proper divisors (78247239).

88139961 is a wasteful number, since it uses less digits than its factorization.

88139961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1295 (or 1289 counting only the distinct ones).

The product of its digits is 93312, while the sum is 45.

The square root of 88139961 is about 9388.2885021712. The cubic root of 88139961 is about 445.0317041755.

The spelling of 88139961 in words is "eighty-eight million, one hundred thirty-nine thousand, nine hundred sixty-one".