88129681 has 2 divisors, whose sum is σ = 88129682. Its totient is φ = 88129680.

The previous prime is 88129667. The next prime is 88129693. The reversal of 88129681 is 18692188.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88059456 + 70225 = 9384^2 + 265^2 .

It is a cyclic number.

It is not a de Polignac number, because 88129681 - 2⁷ = 88129553 is a prime.

It is a super-2 number, since 2×88129681² = 15533681346323522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (88129631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44064840 + 44064841.

It is an arithmetic number, because the mean of its divisors is an integer number (44064841).

Almost surely, 2^88129681 is an apocalyptic number.

It is an amenable number.

88129681 is a deficient number, since it is larger than the sum of its proper divisors (1).

88129681 is an equidigital number, since it uses as much as digits as its factorization.

88129681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 55296, while the sum is 43.

The square root of 88129681 is about 9387.7409955750. The cubic root of 88129681 is about 445.0144017558.

The spelling of 88129681 in words is "eighty-eight million, one hundred twenty-nine thousand, six hundred eighty-one".