90502801 has 2 divisors, whose sum is σ = 90502802. Its totient is φ = 90502800.

The previous prime is 90502799. The next prime is 90502829. The reversal of 90502801 is 10820509.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71571600 + 18931201 = 8460^2 + 4351^2 .

It is a cyclic number.

It is not a de Polignac number, because 90502801 - 2¹ = 90502799 is a prime.

Together with 90502799, it forms a pair of twin primes.

It is equal to p_5244541 and since 90502801 and 5244541 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (90502891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45251400 + 45251401.

It is an arithmetic number, because the mean of its divisors is an integer number (45251401).

Almost surely, 2^90502801 is an apocalyptic number.

It is an amenable number.

90502801 is a deficient number, since it is larger than the sum of its proper divisors (1).

90502801 is an equidigital number, since it uses as much as digits as its factorization.

90502801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 90502801 is about 9513.2960113727. The cubic root of 90502801 is about 448.9734641719.

The spelling of 90502801 in words is "ninety million, five hundred two thousand, eight hundred one".