630739 has 4 divisors (see below), whose sum is σ = 647824. Its totient is φ = 613656.

The previous prime is 630737. The next prime is 630797. The reversal of 630739 is 937036.

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 630739 - 2¹ = 630737 is a prime.

It is a super-2 number, since 2×630739² = 795663372242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (630733) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 8487 + ... + 8560.

It is an arithmetic number, because the mean of its divisors is an integer number (161956).

2⁶³⁰⁷³⁹ is an apocalyptic number.

630739 is a deficient number, since it is larger than the sum of its proper divisors (17085).

630739 is a wasteful number, since it uses less digits than its factorization.

630739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17084.

The product of its (nonzero) digits is 3402, while the sum is 28.

The square root of 630739 is about 794.1907831246. The cubic root of 630739 is about 85.7596951188.

It can be divided in two parts, 630 and 739, that added together give a square (1369 = 37²).

The spelling of 630739 in words is "six hundred thirty thousand, seven hundred thirty-nine".