901902973 has 4 divisors (see below), whose sum is σ = 902533788. Its totient is φ = 901272160.

The previous prime is 901902907. The next prime is 901902977. The reversal of 901902973 is 379209109.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 726949444 + 174953529 = 26962^2 + 13227^2 .

It is a cyclic number.

It is not a de Polignac number, because 901902973 - 2²¹ = 899805821 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (901902977) 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, 313258 + ... + 316123.

It is an arithmetic number, because the mean of its divisors is an integer number (225633447).

Almost surely, 2^901902973 is an apocalyptic number.

It is an amenable number.

901902973 is a deficient number, since it is larger than the sum of its proper divisors (630815).

901902973 is a wasteful number, since it uses less digits than its factorization.

901902973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630814.

The product of its (nonzero) digits is 30618, while the sum is 40.

The square root of 901902973 is about 30031.6994690610. The cubic root of 901902973 is about 966.1693871285.

The spelling of 901902973 in words is "nine hundred one million, nine hundred two thousand, nine hundred seventy-three".