88871561 has 2 divisors, whose sum is σ = 88871562. Its totient is φ = 88871560.

The previous prime is 88871557. The next prime is 88871567. The reversal of 88871561 is 16517888.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80640400 + 8231161 = 8980^2 + 2869^2 .

It is a cyclic number.

It is not a de Polignac number, because 88871561 - 2² = 88871557 is a prime.

It is not a weakly prime, because it can be changed into another prime (88871567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44435780 + 44435781.

It is an arithmetic number, because the mean of its divisors is an integer number (44435781).

Almost surely, 2^88871561 is an apocalyptic number.

It is an amenable number.

88871561 is a deficient number, since it is larger than the sum of its proper divisors (1).

88871561 is an equidigital number, since it uses as much as digits as its factorization.

88871561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 107520, while the sum is 44.

The square root of 88871561 is about 9427.1714209512. The cubic root of 88871561 is about 446.2596318541.

The spelling of 88871561 in words is "eighty-eight million, eight hundred seventy-one thousand, five hundred sixty-one".