88681381 has 2 divisors, whose sum is σ = 88681382. Its totient is φ = 88681380.

The previous prime is 88681337. The next prime is 88681387. The reversal of 88681381 is 18318688.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88529281 + 152100 = 9409^2 + 390^2 .

It is a cyclic number.

It is not a de Polignac number, because 88681381 - 2²⁵ = 55126949 is a prime.

It is a super-2 number, since 2×88681381² = 15728774672134322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (88681387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44340690 + 44340691.

It is an arithmetic number, because the mean of its divisors is an integer number (44340691).

Almost surely, 2^88681381 is an apocalyptic number.

It is an amenable number.

88681381 is a deficient number, since it is larger than the sum of its proper divisors (1).

88681381 is an equidigital number, since it uses as much as digits as its factorization.

88681381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 73728, while the sum is 43.

The square root of 88681381 is about 9417.0792181015. The cubic root of 88681381 is about 445.9410812528.

The spelling of 88681381 in words is "eighty-eight million, six hundred eighty-one thousand, three hundred eighty-one".