629639139 has 4 divisors (see below), whose sum is σ = 839518856. Its totient is φ = 419759424.

The previous prime is 629639117. The next prime is 629639161. The reversal of 629639139 is 931936926.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (629639117) and next prime (629639161).

It is not a de Polignac number, because 629639139 - 2⁵ = 629639107 is a prime.

It is a super-2 number, since 2×629639139² = 792890890721322642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (629639189) 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, 104939854 + ... + 104939859.

It is an arithmetic number, because the mean of its divisors is an integer number (209879714).

Almost surely, 2^629639139 is an apocalyptic number.

629639139 is a deficient number, since it is larger than the sum of its proper divisors (209879717).

629639139 is a wasteful number, since it uses less digits than its factorization.

629639139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209879716.

The product of its digits is 472392, while the sum is 48.

The square root of 629639139 is about 25092.6112431528. The cubic root of 629639139 is about 857.0981784608.

The spelling of 629639139 in words is "six hundred twenty-nine million, six hundred thirty-nine thousand, one hundred thirty-nine".