90875901 has 4 divisors (see below), whose sum is σ = 121167872. Its totient is φ = 60583932.

The previous prime is 90875891. The next prime is 90875927. The reversal of 90875901 is 10957809.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 90875901 - 2⁷ = 90875773 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 90875901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90875951) 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, 15145981 + ... + 15145986.

It is an arithmetic number, because the mean of its divisors is an integer number (30291968).

Almost surely, 2^90875901 is an apocalyptic number.

It is an amenable number.

90875901 is a deficient number, since it is larger than the sum of its proper divisors (30291971).

90875901 is a wasteful number, since it uses less digits than its factorization.

90875901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30291970.

The product of its (nonzero) digits is 22680, while the sum is 39.

The square root of 90875901 is about 9532.8852400519. The cubic root of 90875901 is about 449.5895862978.

The spelling of 90875901 in words is "ninety million, eight hundred seventy-five thousand, nine hundred one".