90415477 has 2 divisors, whose sum is σ = 90415478. Its totient is φ = 90415476.

The previous prime is 90415463. The next prime is 90415487. The reversal of 90415477 is 77451409.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57168721 + 33246756 = 7561^2 + 5766^2 .

It is a cyclic number.

It is not a de Polignac number, because 90415477 - 2²³ = 82026869 is a prime.

It is a super-2 number, since 2×90415477² = 16349916962275058, which contains 22 as substring.

It is equal to p_5239774 and since 90415477 and 5239774 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90415487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45207738 + 45207739.

It is an arithmetic number, because the mean of its divisors is an integer number (45207739).

Almost surely, 2^90415477 is an apocalyptic number.

It is an amenable number.

90415477 is a deficient number, since it is larger than the sum of its proper divisors (1).

90415477 is an equidigital number, since it uses as much as digits as its factorization.

90415477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35280, while the sum is 37.

The square root of 90415477 is about 9508.7053272252. The cubic root of 90415477 is about 448.8290164317.

The spelling of 90415477 in words is "ninety million, four hundred fifteen thousand, four hundred seventy-seven".