88390609 has 2 divisors, whose sum is σ = 88390610. Its totient is φ = 88390608.

The previous prime is 88390559. The next prime is 88390639. The reversal of 88390609 is 90609388.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70140625 + 18249984 = 8375^2 + 4272^2 .

It is a cyclic number.

It is not a de Polignac number, because 88390609 - 2¹³ = 88382417 is a prime.

It is not a weakly prime, because it can be changed into another prime (88390639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44195304 + 44195305.

It is an arithmetic number, because the mean of its divisors is an integer number (44195305).

Almost surely, 2^88390609 is an apocalyptic number.

It is an amenable number.

88390609 is a deficient number, since it is larger than the sum of its proper divisors (1).

88390609 is an equidigital number, since it uses as much as digits as its factorization.

88390609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 88390609 is about 9401.6279973205. The cubic root of 88390609 is about 445.4531578706.

The spelling of 88390609 in words is "eighty-eight million, three hundred ninety thousand, six hundred nine".