88691399 has 2 divisors, whose sum is σ = 88691400. Its totient is φ = 88691398.

The previous prime is 88691389. The next prime is 88691401. The reversal of 88691399 is 99319688.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-88691399 is a prime.

It is a super-3 number, since 3×88691399³ (a number of 25 digits) contains 333 as substring.

Together with 88691401, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 88691399.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (88691359) 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, 44345699 + 44345700.

It is an arithmetic number, because the mean of its divisors is an integer number (44345700).

Almost surely, 2^88691399 is an apocalyptic number.

88691399 is a deficient number, since it is larger than the sum of its proper divisors (1).

88691399 is an equidigital number, since it uses as much as digits as its factorization.

88691399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 839808, while the sum is 53.

The square root of 88691399 is about 9417.6111089809. The cubic root of 88691399 is about 445.9578727126.

The spelling of 88691399 in words is "eighty-eight million, six hundred ninety-one thousand, three hundred ninety-nine".