69747139 has 12 divisors (see below), whose sum is σ = 88510968. Its totient is φ = 54348000.

The previous prime is 69747101. The next prime is 69747143. The reversal of 69747139 is 93174796.

It is not a de Polignac number, because 69747139 - 2⁷ = 69747011 is a prime.

It is not an unprimeable number, because it can be changed into a prime (69747169) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64162 + ... + 65239.

It is an arithmetic number, because the mean of its divisors is an integer number (7375914).

Almost surely, 2^69747139 is an apocalyptic number.

69747139 is a deficient number, since it is larger than the sum of its proper divisors (18763829).

69747139 is a wasteful number, since it uses less digits than its factorization.

69747139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129426 (or 129419 counting only the distinct ones).

The product of its digits is 285768, while the sum is 46.

The square root of 69747139 is about 8351.4752588989. The cubic root of 69747139 is about 411.6316872885.

The spelling of 69747139 in words is "sixty-nine million, seven hundred forty-seven thousand, one hundred thirty-nine".