630525971 has 4 divisors (see below), whose sum is σ = 667615752. Its totient is φ = 593436192.

The previous prime is 630525967. The next prime is 630525983. The reversal of 630525971 is 179525036.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 630525971 - 2² = 630525967 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (630525941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18544865 + ... + 18544898.

It is an arithmetic number, because the mean of its divisors is an integer number (166903938).

Almost surely, 2^630525971 is an apocalyptic number.

630525971 is a deficient number, since it is larger than the sum of its proper divisors (37089781).

630525971 is a wasteful number, since it uses less digits than its factorization.

630525971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37089780.

The product of its (nonzero) digits is 56700, while the sum is 38.

The square root of 630525971 is about 25110.2762031802. The cubic root of 630525971 is about 857.5003905967.

The spelling of 630525971 in words is "six hundred thirty million, five hundred twenty-five thousand, nine hundred seventy-one".