90307157 has 2 divisors, whose sum is σ = 90307158. Its totient is φ = 90307156.

The previous prime is 90307153. The next prime is 90307159. The reversal of 90307157 is 75170309.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59382436 + 30924721 = 7706^2 + 5561^2 .

It is a cyclic number.

It is not a de Polignac number, because 90307157 - 2² = 90307153 is a prime.

Together with 90307159, 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 (90307153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45153578 + 45153579.

It is an arithmetic number, because the mean of its divisors is an integer number (45153579).

Almost surely, 2^90307157 is an apocalyptic number.

It is an amenable number.

90307157 is a deficient number, since it is larger than the sum of its proper divisors (1).

90307157 is an equidigital number, since it uses as much as digits as its factorization.

90307157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6615, while the sum is 32.

The square root of 90307157 is about 9503.0077870114. The cubic root of 90307157 is about 448.6497086831.

The spelling of 90307157 in words is "ninety million, three hundred seven thousand, one hundred fifty-seven".