630645254 has 4 divisors (see below), whose sum is σ = 945967884. Its totient is φ = 315322626.

The previous prime is 630645199. The next prime is 630645269. The reversal of 630645254 is 452546036.

It is a happy number.

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

It is a super-3 number, since 3×630645254³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157661312 + ... + 157661315.

It is an arithmetic number, because the mean of its divisors is an integer number (236491971).

Almost surely, 2^630645254 is an apocalyptic number.

630645254 is a deficient number, since it is larger than the sum of its proper divisors (315322630).

630645254 is a wasteful number, since it uses less digits than its factorization.

630645254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315322629.

The product of its (nonzero) digits is 86400, while the sum is 35.

The square root of 630645254 is about 25112.6512738102. The cubic root of 630645254 is about 857.5544612057.

The spelling of 630645254 in words is "six hundred thirty million, six hundred forty-five thousand, two hundred fifty-four".