88199581 has 2 divisors, whose sum is σ = 88199582. Its totient is φ = 88199580.

The previous prime is 88199509. The next prime is 88199593. The reversal of 88199581 is 18599188.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86322681 + 1876900 = 9291^2 + 1370^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-88199581 is a prime.

It is a super-2 number, since 2×88199581² = 15558332177151122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (88199381) 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, 44099790 + 44099791.

It is an arithmetic number, because the mean of its divisors is an integer number (44099791).

Almost surely, 2^88199581 is an apocalyptic number.

It is an amenable number.

88199581 is a deficient number, since it is larger than the sum of its proper divisors (1).

88199581 is an equidigital number, since it uses as much as digits as its factorization.

88199581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 207360, while the sum is 49.

The square root of 88199581 is about 9391.4631980326. The cubic root of 88199581 is about 445.1320249596.

The spelling of 88199581 in words is "eighty-eight million, one hundred ninety-nine thousand, five hundred eighty-one".