901630857 has 4 divisors (see below), whose sum is σ = 1202174480. Its totient is φ = 601087236.

The previous prime is 901630831. The next prime is 901630879. The reversal of 901630857 is 758036109.

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 901630857 - 2⁸ = 901630601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (901630817) 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, 150271807 + ... + 150271812.

It is an arithmetic number, because the mean of its divisors is an integer number (300543620).

Almost surely, 2^901630857 is an apocalyptic number.

It is an amenable number.

901630857 is a deficient number, since it is larger than the sum of its proper divisors (300543623).

901630857 is a wasteful number, since it uses less digits than its factorization.

901630857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300543622.

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 901630857 is about 30027.1686477430. The cubic root of 901630857 is about 966.0722086801.

The spelling of 901630857 in words is "nine hundred one million, six hundred thirty thousand, eight hundred fifty-seven".