69135139 has 2 divisors, whose sum is σ = 69135140. Its totient is φ = 69135138.

The previous prime is 69135113. The next prime is 69135149. The reversal of 69135139 is 93153196.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 69135139 - 2⁹ = 69134627 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 69135098 and 69135107.

It is not a weakly prime, because it can be changed into another prime (69135149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34567569 + 34567570.

It is an arithmetic number, because the mean of its divisors is an integer number (34567570).

Almost surely, 2^69135139 is an apocalyptic number.

69135139 is a deficient number, since it is larger than the sum of its proper divisors (1).

69135139 is an equidigital number, since it uses as much as digits as its factorization.

69135139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21870, while the sum is 37.

The square root of 69135139 is about 8314.7542958286. The cubic root of 69135139 is about 410.4241871979.

The spelling of 69135139 in words is "sixty-nine million, one hundred thirty-five thousand, one hundred thirty-nine".