69639423387 has 4 divisors (see below), whose sum is σ = 92852564520. Its totient is φ = 46426282256.

The previous prime is 69639423377. The next prime is 69639423389. The reversal of 69639423387 is 78332493696.

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 69639423387 - 2⁶ = 69639423323 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 69639423387.

It is not an unprimeable number, because it can be changed into a prime (69639423389) 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, 11606570562 + ... + 11606570567.

It is an arithmetic number, because the mean of its divisors is an integer number (23213141130).

Almost surely, 2^69639423387 is an apocalyptic number.

69639423387 is a deficient number, since it is larger than the sum of its proper divisors (23213141133).

69639423387 is a wasteful number, since it uses less digits than its factorization.

69639423387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23213141132.

The product of its digits is 35271936, while the sum is 60.

The spelling of 69639423387 in words is "sixty-nine billion, six hundred thirty-nine million, four hundred twenty-three thousand, three hundred eighty-seven".