630869457 has 4 divisors (see below), whose sum is σ = 841159280. Its totient is φ = 420579636.

The previous prime is 630869443. The next prime is 630869497. The reversal of 630869457 is 754968036.

630869457 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 630869457 - 2²⁰ = 629820881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (630869497) 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, 105144907 + ... + 105144912.

It is an arithmetic number, because the mean of its divisors is an integer number (210289820).

Almost surely, 2^630869457 is an apocalyptic number.

It is an amenable number.

630869457 is a deficient number, since it is larger than the sum of its proper divisors (210289823).

630869457 is a wasteful number, since it uses less digits than its factorization.

630869457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210289822.

The product of its (nonzero) digits is 1088640, while the sum is 48.

The square root of 630869457 is about 25117.1148223676. The cubic root of 630869457 is about 857.6560732724.

The spelling of 630869457 in words is "six hundred thirty million, eight hundred sixty-nine thousand, four hundred fifty-seven".