69927139 has 4 divisors (see below), whose sum is σ = 70098520. Its totient is φ = 69755760.

The previous prime is 69927133. The next prime is 69927161. The reversal of 69927139 is 93172996.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 69927139 - 2¹¹ = 69925091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (69927133) 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, 85077 + ... + 85894.

It is an arithmetic number, because the mean of its divisors is an integer number (17524630).

Almost surely, 2^69927139 is an apocalyptic number.

69927139 is a deficient number, since it is larger than the sum of its proper divisors (171381).

69927139 is a wasteful number, since it uses less digits than its factorization.

69927139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171380.

The product of its digits is 183708, while the sum is 46.

The square root of 69927139 is about 8362.2448541047. The cubic root of 69927139 is about 411.9854894032.

The spelling of 69927139 in words is "sixty-nine million, nine hundred twenty-seven thousand, one hundred thirty-nine".