625948139 has 4 divisors (see below), whose sum is σ = 626000256. Its totient is φ = 625896024.

The previous prime is 625948121. The next prime is 625948159. The reversal of 625948139 is 931849526.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 625948139 - 2¹² = 625944043 is a prime.

It is a super-2 number, since 2×625948139² = 783622145435126642, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 625948093 and 625948102.

It is not an unprimeable number, because it can be changed into a prime (625948159) 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, 2102 + ... + 35444.

It is an arithmetic number, because the mean of its divisors is an integer number (156500064).

Almost surely, 2^625948139 is an apocalyptic number.

625948139 is a deficient number, since it is larger than the sum of its proper divisors (52117).

625948139 is a wasteful number, since it uses less digits than its factorization.

625948139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52116.

The product of its digits is 466560, while the sum is 47.

The square root of 625948139 is about 25018.9555937093. The cubic root of 625948139 is about 855.4201001990.

The spelling of 625948139 in words is "six hundred twenty-five million, nine hundred forty-eight thousand, one hundred thirty-nine".