90573819673 has 4 divisors (see below), whose sum is σ = 92782937268. Its totient is φ = 88364702080.

The previous prime is 90573819667. The next prime is 90573819731. The reversal of 90573819673 is 37691837509.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 37691837509 = 311 ⋅121195619.

It can be written as a sum of positive squares in 2 ways, for example, as 26750892249 + 63822927424 = 163557^2 + 252632^2 .

It is a cyclic number.

It is not a de Polignac number, because 90573819673 - 2²⁵ = 90540265241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90573819773) 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, 1104558736 + ... + 1104558817.

It is an arithmetic number, because the mean of its divisors is an integer number (23195734317).

Almost surely, 2^90573819673 is an apocalyptic number.

It is an amenable number.

90573819673 is a deficient number, since it is larger than the sum of its proper divisors (2209117595).

90573819673 is a wasteful number, since it uses less digits than its factorization.

90573819673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2209117594.

The product of its (nonzero) digits is 8573040, while the sum is 58.

The spelling of 90573819673 in words is "ninety billion, five hundred seventy-three million, eight hundred nineteen thousand, six hundred seventy-three".