90307957 has 2 divisors, whose sum is σ = 90307958. Its totient is φ = 90307956.

The previous prime is 90307949. The next prime is 90308011. The reversal of 90307957 is 75970309.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89984196 + 323761 = 9486^2 + 569^2 .

It is a cyclic number.

It is not a de Polignac number, because 90307957 - 2³ = 90307949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90307907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45153978 + 45153979.

It is an arithmetic number, because the mean of its divisors is an integer number (45153979).

Almost surely, 2^90307957 is an apocalyptic number.

It is an amenable number.

90307957 is a deficient number, since it is larger than the sum of its proper divisors (1).

90307957 is an equidigital number, since it uses as much as digits as its factorization.

90307957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 59535, while the sum is 40.

The square root of 90307957 is about 9503.0498788547. The cubic root of 90307957 is about 448.6510334903.

The spelling of 90307957 in words is "ninety million, three hundred seven thousand, nine hundred fifty-seven".