139994291 has 8 divisors (see below), whose sum is σ = 141252000. Its totient is φ = 138741120.

The previous prime is 139994279. The next prime is 139994293. The reversal of 139994291 is 192499931.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139994291 is a prime.

It is not an unprimeable number, because it can be changed into a prime (139994293) 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 7 ways as a sum of consecutive naturals, for example, 93275 + ... + 94763.

It is an arithmetic number, because the mean of its divisors is an integer number (17656500).

Almost surely, 2^139994291 is an apocalyptic number.

139994291 is a deficient number, since it is larger than the sum of its proper divisors (1257709).

139994291 is a wasteful number, since it uses less digits than its factorization.

139994291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2269.

The product of its digits is 157464, while the sum is 47.

The square root of 139994291 is about 11831.9183144577. The cubic root of 139994291 is about 519.2423520061.

The spelling of 139994291 in words is "one hundred thirty-nine million, nine hundred ninety-four thousand, two hundred ninety-one".