90318157 has 2 divisors, whose sum is σ = 90318158. Its totient is φ = 90318156.

The previous prime is 90318143. The next prime is 90318167. The reversal of 90318157 is 75181309.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75794436 + 14523721 = 8706^2 + 3811^2 .

It is a cyclic number.

It is not a de Polignac number, because 90318157 - 2⁷ = 90318029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90318167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45159078 + 45159079.

It is an arithmetic number, because the mean of its divisors is an integer number (45159079).

Almost surely, 2^90318157 is an apocalyptic number.

It is an amenable number.

90318157 is a deficient number, since it is larger than the sum of its proper divisors (1).

90318157 is an equidigital number, since it uses as much as digits as its factorization.

90318157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 34.

The square root of 90318157 is about 9503.5865335146. The cubic root of 90318157 is about 448.6679240959.

The spelling of 90318157 in words is "ninety million, three hundred eighteen thousand, one hundred fifty-seven".