630939 has 16 divisors (see below), whose sum is σ = 885632. Its totient is φ = 399168.

The previous prime is 630919. The next prime is 630941. The reversal of 630939 is 939036.

630939 = T₂₂ + T₂₃ + ... + T₁₅₅.

It is not a de Polignac number, because 630939 - 2⁵ = 630907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (630919) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8607 + ... + 8679.

It is an arithmetic number, because the mean of its divisors is an integer number (55352).

2⁶³⁰⁹³⁹ is an apocalyptic number.

630939 is a deficient number, since it is larger than the sum of its proper divisors (254693).

630939 is a wasteful number, since it uses less digits than its factorization.

630939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186.

The product of its (nonzero) digits is 4374, while the sum is 30.

The square root of 630939 is about 794.3166874742. The cubic root of 630939 is about 85.7687586282.

It can be divided in two parts, 6309 and 39, that multiplied together give a triangular number (246051 = T₇₀₁).

The spelling of 630939 in words is "six hundred thirty thousand, nine hundred thirty-nine".