8629139 has 2 divisors, whose sum is σ = 8629140. Its totient is φ = 8629138.

The previous prime is 8629123. The next prime is 8629141. The reversal of 8629139 is 9319268.

8629139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8629139 - 2⁴ = 8629123 is a prime.

It is a Sophie Germain prime.

Together with 8629141, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (8629109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4314569 + 4314570.

It is an arithmetic number, because the mean of its divisors is an integer number (4314570).

Almost surely, 2^8629139 is an apocalyptic number.

8629139 is a deficient number, since it is larger than the sum of its proper divisors (1).

8629139 is an equidigital number, since it uses as much as digits as its factorization.

8629139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 38.

The square root of 8629139 is about 2937.5396167541. The cubic root of 8629139 is about 205.1110958408. Note that the first 3 decimals are identical.

It can be divided in two parts, 862 and 9139, that added together give a palindrome (10001).

The spelling of 8629139 in words is "eight million, six hundred twenty-nine thousand, one hundred thirty-nine".