88021457 has 2 divisors, whose sum is σ = 88021458. Its totient is φ = 88021456.

The previous prime is 88021421. The next prime is 88021487. The reversal of 88021457 is 75412088.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75411856 + 12609601 = 8684^2 + 3551^2 .

It is a cyclic number.

It is not a de Polignac number, because 88021457 - 2⁸ = 88021201 is a prime.

It is not a weakly prime, because it can be changed into another prime (88021487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44010728 + 44010729.

It is an arithmetic number, because the mean of its divisors is an integer number (44010729).

Almost surely, 2^88021457 is an apocalyptic number.

It is an amenable number.

88021457 is a deficient number, since it is larger than the sum of its proper divisors (1).

88021457 is an equidigital number, since it uses as much as digits as its factorization.

88021457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17920, while the sum is 35.

The square root of 88021457 is about 9381.9751118834. The cubic root of 88021457 is about 444.8321666463.

The spelling of 88021457 in words is "eighty-eight million, twenty-one thousand, four hundred fifty-seven".