139073919 has 4 divisors (see below), whose sum is σ = 185431896. Its totient is φ = 92715944.

The previous prime is 139073903. The next prime is 139073929. The reversal of 139073919 is 919370931.

139073919 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 139073919 - 2⁴ = 139073903 is a prime.

It is a super-2 number, since 2×139073919² = 38683109892037122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139073929) 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, 23178984 + ... + 23178989.

It is an arithmetic number, because the mean of its divisors is an integer number (46357974).

Almost surely, 2^139073919 is an apocalyptic number.

139073919 is a deficient number, since it is larger than the sum of its proper divisors (46357977).

139073919 is an equidigital number, since it uses as much as digits as its factorization.

139073919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46357976.

The product of its (nonzero) digits is 45927, while the sum is 42.

The square root of 139073919 is about 11792.9605697636. The cubic root of 139073919 is about 518.1019549070.

The spelling of 139073919 in words is "one hundred thirty-nine million, seventy-three thousand, nine hundred nineteen".