139717929 has 16 divisors (see below), whose sum is σ = 201321792. Its totient is φ = 85679808.

The previous prime is 139717909. The next prime is 139717931. The reversal of 139717929 is 929717931.

It is a happy number.

139717929 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 139717929 - 2¹⁷ = 139586857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (139717909) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5314 + ... + 17540.

It is an arithmetic number, because the mean of its divisors is an integer number (12582612).

Almost surely, 2^139717929 is an apocalyptic number.

It is an amenable number.

139717929 is a deficient number, since it is larger than the sum of its proper divisors (61603863).

139717929 is a wasteful number, since it uses less digits than its factorization.

139717929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12536.

The product of its digits is 214326, while the sum is 48.

The square root of 139717929 is about 11820.2338809348. The cubic root of 139717929 is about 518.9004490510.

The spelling of 139717929 in words is "one hundred thirty-nine million, seven hundred seventeen thousand, nine hundred twenty-nine".