139434177 has 4 divisors (see below), whose sum is σ = 185912240. Its totient is φ = 92956116.

The previous prime is 139434157. The next prime is 139434193. The reversal of 139434177 is 771434931.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 771434931 = 3 ⋅257144977.

It is not a de Polignac number, because 139434177 - 2⁷ = 139434049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139434137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23239027 + ... + 23239032.

It is an arithmetic number, because the mean of its divisors is an integer number (46478060).

Almost surely, 2^139434177 is an apocalyptic number.

It is an amenable number.

139434177 is a deficient number, since it is larger than the sum of its proper divisors (46478063).

139434177 is an equidigital number, since it uses as much as digits as its factorization.

139434177 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46478062.

The product of its digits is 63504, while the sum is 39.

The square root of 139434177 is about 11808.2249724503. The cubic root of 139434177 is about 518.5489340870.

The spelling of 139434177 in words is "one hundred thirty-nine million, four hundred thirty-four thousand, one hundred seventy-seven".