88981513 has 2 divisors, whose sum is σ = 88981514. Its totient is φ = 88981512.

The previous prime is 88981433. The next prime is 88981517. The reversal of 88981513 is 31518988.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72114064 + 16867449 = 8492^2 + 4107^2 .

It is a cyclic number.

It is not a de Polignac number, because 88981513 - 2⁹ = 88981001 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 88981513.

It is not a weakly prime, because it can be changed into another prime (88981517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44490756 + 44490757.

It is an arithmetic number, because the mean of its divisors is an integer number (44490757).

Almost surely, 2^88981513 is an apocalyptic number.

It is an amenable number.

88981513 is a deficient number, since it is larger than the sum of its proper divisors (1).

88981513 is an equidigital number, since it uses as much as digits as its factorization.

88981513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69120, while the sum is 43.

The square root of 88981513 is about 9433.0012721297. The cubic root of 88981513 is about 446.4435936565.

The spelling of 88981513 in words is "eighty-eight million, nine hundred eighty-one thousand, five hundred thirteen".