88299721 has 2 divisors, whose sum is σ = 88299722. Its totient is φ = 88299720.

The previous prime is 88299713. The next prime is 88299733. The reversal of 88299721 is 12799288.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52359696 + 35940025 = 7236^2 + 5995^2 .

It is a cyclic number.

It is not a de Polignac number, because 88299721 - 2³ = 88299713 is a prime.

It is not a weakly prime, because it can be changed into another prime (88299781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44149860 + 44149861.

It is an arithmetic number, because the mean of its divisors is an integer number (44149861).

Almost surely, 2^88299721 is an apocalyptic number.

It is an amenable number.

88299721 is a deficient number, since it is larger than the sum of its proper divisors (1).

88299721 is an equidigital number, since it uses as much as digits as its factorization.

88299721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 46.

The square root of 88299721 is about 9396.7931231884. The cubic root of 88299721 is about 445.3004258411.

The spelling of 88299721 in words is "eighty-eight million, two hundred ninety-nine thousand, seven hundred twenty-one".