88691961 has 32 divisors (see below), whose sum is σ = 126517248. Its totient is φ = 55177920.

The previous prime is 88691959. The next prime is 88691983. The reversal of 88691961 is 16919688.

It is not a de Polignac number, because 88691961 - 2¹ = 88691959 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 88691961.

It is not an unprimeable number, because it can be changed into a prime (88691921) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 450115 + ... + 450311.

It is an arithmetic number, because the mean of its divisors is an integer number (3953664).

Almost surely, 2^88691961 is an apocalyptic number.

It is an amenable number.

88691961 is a deficient number, since it is larger than the sum of its proper divisors (37825287).

88691961 is a wasteful number, since it uses less digits than its factorization.

88691961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381.

The product of its digits is 186624, while the sum is 48.

The square root of 88691961 is about 9417.6409466490. The cubic root of 88691961 is about 445.9588146596.

The spelling of 88691961 in words is "eighty-eight million, six hundred ninety-one thousand, nine hundred sixty-one".