69216139 has 2 divisors, whose sum is σ = 69216140. Its totient is φ = 69216138.

The previous prime is 69216137. The next prime is 69216179. The reversal of 69216139 is 93161296.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 69216139 - 2¹ = 69216137 is a prime.

Together with 69216137, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 69216098 and 69216107.

It is not a weakly prime, because it can be changed into another prime (69216137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34608069 + 34608070.

It is an arithmetic number, because the mean of its divisors is an integer number (34608070).

Almost surely, 2^69216139 is an apocalyptic number.

69216139 is a deficient number, since it is larger than the sum of its proper divisors (1).

69216139 is an equidigital number, since it uses as much as digits as its factorization.

69216139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17496, while the sum is 37.

The square root of 69216139 is about 8319.6237294724. The cubic root of 69216139 is about 410.5844114816.

The spelling of 69216139 in words is "sixty-nine million, two hundred sixteen thousand, one hundred thirty-nine".