90154957 has 2 divisors, whose sum is σ = 90154958. Its totient is φ = 90154956.

The previous prime is 90154951. The next prime is 90154979. The reversal of 90154957 is 75945109.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89472681 + 682276 = 9459^2 + 826^2 .

It is a cyclic number.

It is not a de Polignac number, because 90154957 - 2³ = 90154949 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90154951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45077478 + 45077479.

It is an arithmetic number, because the mean of its divisors is an integer number (45077479).

Almost surely, 2^90154957 is an apocalyptic number.

It is an amenable number.

90154957 is a deficient number, since it is larger than the sum of its proper divisors (1).

90154957 is an equidigital number, since it uses as much as digits as its factorization.

90154957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56700, while the sum is 40.

The square root of 90154957 is about 9494.9964191673. The cubic root of 90154957 is about 448.3975216466.

The spelling of 90154957 in words is "ninety million, one hundred fifty-four thousand, nine hundred fifty-seven".