90633577 has 2 divisors, whose sum is σ = 90633578. Its totient is φ = 90633576.

The previous prime is 90633563. The next prime is 90633581. The reversal of 90633577 is 77533609.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82246761 + 8386816 = 9069^2 + 2896^2 .

It is an emirp because it is prime and its reverse (77533609) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90633577 - 2¹⁹ = 90109289 is a prime.

It is not a weakly prime, because it can be changed into another prime (90633377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45316788 + 45316789.

It is an arithmetic number, because the mean of its divisors is an integer number (45316789).

Almost surely, 2^90633577 is an apocalyptic number.

It is an amenable number.

90633577 is a deficient number, since it is larger than the sum of its proper divisors (1).

90633577 is an equidigital number, since it uses as much as digits as its factorization.

90633577 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 119070, while the sum is 40.

The square root of 90633577 is about 9520.1668577814. The cubic root of 90633577 is about 449.1896147398.

The spelling of 90633577 in words is "ninety million, six hundred thirty-three thousand, five hundred seventy-seven".