69142839 has 8 divisors (see below), whose sum is σ = 94334592. Its totient is φ = 45023160.

The previous prime is 69142819. The next prime is 69142841. The reversal of 69142839 is 93824196.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 69142839 - 2¹² = 69138743 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 69142839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69142819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 267867 + ... + 268124.

It is an arithmetic number, because the mean of its divisors is an integer number (11791824).

Almost surely, 2^69142839 is an apocalyptic number.

69142839 is a deficient number, since it is larger than the sum of its proper divisors (25191753).

69142839 is a wasteful number, since it uses less digits than its factorization.

69142839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536037.

The product of its digits is 93312, while the sum is 42.

The square root of 69142839 is about 8315.2173152600. The cubic root of 69142839 is about 410.4394237764.

The spelling of 69142839 in words is "sixty-nine million, one hundred forty-two thousand, eight hundred thirty-nine".