69742939 has 16 divisors (see below), whose sum is σ = 84582400. Its totient is φ = 56173824.

The previous prime is 69742931. The next prime is 69742951. The reversal of 69742939 is 93924796.

It is not a de Polignac number, because 69742939 - 2³ = 69742931 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 69742892 and 69742901.

It is not an unprimeable number, because it can be changed into a prime (69742931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14827 + ... + 18955.

It is an arithmetic number, because the mean of its divisors is an integer number (5286400).

Almost surely, 2^69742939 is an apocalyptic number.

69742939 is a deficient number, since it is larger than the sum of its proper divisors (14839461).

69742939 is a wasteful number, since it uses less digits than its factorization.

69742939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4282.

The product of its digits is 734832, while the sum is 49.

The square root of 69742939 is about 8351.2238025334. The cubic root of 69742939 is about 411.6234246424.

The spelling of 69742939 in words is "sixty-nine million, seven hundred forty-two thousand, nine hundred thirty-nine".