88989881 has 2 divisors, whose sum is σ = 88989882. Its totient is φ = 88989880.

The previous prime is 88989841. The next prime is 88989899. The reversal of 88989881 is 18898988.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84345856 + 4644025 = 9184^2 + 2155^2 .

It is a cyclic number.

It is not a de Polignac number, because 88989881 - 2¹⁰ = 88988857 is a prime.

It is a super-2 number, since 2×88989881² = 15838397840788322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 88989881.

It is not a weakly prime, because it can be changed into another prime (88989841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44494940 + 44494941.

It is an arithmetic number, because the mean of its divisors is an integer number (44494941).

Almost surely, 2^88989881 is an apocalyptic number.

It is an amenable number.

88989881 is a deficient number, since it is larger than the sum of its proper divisors (1).

88989881 is an equidigital number, since it uses as much as digits as its factorization.

88989881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2654208, while the sum is 59.

The square root of 88989881 is about 9433.4448108843. Note that the first 3 decimals coincide. The cubic root of 88989881 is about 446.4575880349.

The spelling of 88989881 in words is "eighty-eight million, nine hundred eighty-nine thousand, eight hundred eighty-one".