90959597 has 2 divisors, whose sum is σ = 90959598. Its totient is φ = 90959596.

The previous prime is 90959551. The next prime is 90959599. The reversal of 90959597 is 79595909.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82555396 + 8404201 = 9086^2 + 2899^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90959597 is a prime.

Together with 90959599, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90959599) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45479798 + 45479799.

It is an arithmetic number, because the mean of its divisors is an integer number (45479799).

Almost surely, 2^90959597 is an apocalyptic number.

It is an amenable number.

90959597 is a deficient number, since it is larger than the sum of its proper divisors (1).

90959597 is an equidigital number, since it uses as much as digits as its factorization.

90959597 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1148175, while the sum is 53.

The square root of 90959597 is about 9537.2740864463. The cubic root of 90959597 is about 449.7275667875.

It can be divided in two parts, 909 and 59597, that added together give a palindrome (60506).

The spelling of 90959597 in words is "ninety million, nine hundred fifty-nine thousand, five hundred ninety-seven".