139994569 has 16 divisors (see below), whose sum is σ = 168920640. Its totient is φ = 114298560.

The previous prime is 139994567. The next prime is 139994579. The reversal of 139994569 is 965499931.

It is a cyclic number.

It is not a de Polignac number, because 139994569 - 2¹ = 139994567 is a prime.

It is a super-2 number, since 2×139994569² = 39196958698991522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139994567) 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, 7939 + ... + 18520.

It is an arithmetic number, because the mean of its divisors is an integer number (10557540).

Almost surely, 2^139994569 is an apocalyptic number.

It is an amenable number.

139994569 is a deficient number, since it is larger than the sum of its proper divisors (28926071).

139994569 is a wasteful number, since it uses less digits than its factorization.

139994569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26520.

The product of its digits is 2361960, while the sum is 55.

The square root of 139994569 is about 11831.9300623356. The cubic root of 139994569 is about 519.2426957089.

The spelling of 139994569 in words is "one hundred thirty-nine million, nine hundred ninety-four thousand, five hundred sixty-nine".