630819001 has 4 divisors (see below), whose sum is σ = 632466432. Its totient is φ = 629171572.

The previous prime is 630818977. The next prime is 630819023. The reversal of 630819001 is 100918036.

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 a cyclic number.

It is not a de Polignac number, because 630819001 - 2¹⁷ = 630687929 is a prime.

It is a super-2 number, since 2×630819001² = 795865224045276002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (630819041) 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, 823141 + ... + 823906.

It is an arithmetic number, because the mean of its divisors is an integer number (158116608).

Almost surely, 2^630819001 is an apocalyptic number.

It is an amenable number.

630819001 is a deficient number, since it is larger than the sum of its proper divisors (1647431).

630819001 is a wasteful number, since it uses less digits than its factorization.

630819001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1647430.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 630819001 is about 25116.1103875580. The cubic root of 630819001 is about 857.6332079775.

The spelling of 630819001 in words is "six hundred thirty million, eight hundred nineteen thousand, one".