90938207 has 4 divisors (see below), whose sum is σ = 90968640. Its totient is φ = 90907776.

The previous prime is 90938191. The next prime is 90938209. The reversal of 90938207 is 70283909.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70283909 = 3413 ⋅20593.

It is a cyclic number.

It is not a de Polignac number, because 90938207 - 2⁴ = 90938191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90938209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10178 + ... + 16895.

It is an arithmetic number, because the mean of its divisors is an integer number (22742160).

Almost surely, 2^90938207 is an apocalyptic number.

90938207 is a deficient number, since it is larger than the sum of its proper divisors (30433).

90938207 is a wasteful number, since it uses less digits than its factorization.

90938207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30432.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 90938207 is about 9536.1526309094. The cubic root of 90938207 is about 449.6923114759.

The spelling of 90938207 in words is "ninety million, nine hundred thirty-eight thousand, two hundred seven".