624139 has 2 divisors, whose sum is σ = 624140. Its totient is φ = 624138.

The previous prime is 624133. The next prime is 624149. The reversal of 624139 is 931426.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 624139 - 2¹¹ = 622091 is a prime.

It is not a weakly prime, because it can be changed into another prime (624133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312069 + 312070.

It is an arithmetic number, because the mean of its divisors is an integer number (312070).

2⁶²⁴¹³⁹ is an apocalyptic number.

624139 is a deficient number, since it is larger than the sum of its proper divisors (1).

624139 is an equidigital number, since it uses as much as digits as its factorization.

624139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 25.

The square root of 624139 is about 790.0246831587. The cubic root of 624139 is about 85.4595182436.

It can be divided in two parts, 624 and 139, that multiplied together give a triangular number (86736 = T₄₁₆).

The spelling of 624139 in words is "six hundred twenty-four thousand, one hundred thirty-nine".