69660139 has 2 divisors, whose sum is σ = 69660140. Its totient is φ = 69660138.

The previous prime is 69660133. The next prime is 69660223. The reversal of 69660139 is 93106696.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-69660139 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (69660133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34830069 + 34830070.

It is an arithmetic number, because the mean of its divisors is an integer number (34830070).

Almost surely, 2^69660139 is an apocalyptic number.

69660139 is a deficient number, since it is larger than the sum of its proper divisors (1).

69660139 is an equidigital number, since it uses as much as digits as its factorization.

69660139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52488, while the sum is 40.

The square root of 69660139 is about 8346.2649730284. The cubic root of 69660139 is about 411.4604646988.

The spelling of 69660139 in words is "sixty-nine million, six hundred sixty thousand, one hundred thirty-nine".