90207801 has 24 divisors (see below), whose sum is σ = 137548320. Its totient is φ = 56811456.

The previous prime is 90207773. The next prime is 90207827. The reversal of 90207801 is 10870209.

It is not a de Polignac number, because 90207801 - 2¹⁴ = 90191417 is a prime.

It is a super-2 number, since 2×90207801² = 16274894722511202, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (90207881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 95805 + ... + 96741.

It is an arithmetic number, because the mean of its divisors is an integer number (5731180).

Almost surely, 2^90207801 is an apocalyptic number.

It is an amenable number.

90207801 is a deficient number, since it is larger than the sum of its proper divisors (47340519).

90207801 is a wasteful number, since it uses less digits than its factorization.

90207801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1525 (or 1522 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The square root of 90207801 is about 9497.7787403161. The cubic root of 90207801 is about 448.4851133935.

The spelling of 90207801 in words is "ninety million, two hundred seven thousand, eight hundred one".