139573157 has 4 divisors (see below), whose sum is σ = 140462316. Its totient is φ = 138684000.

The previous prime is 139573117. The next prime is 139573163. The reversal of 139573157 is 751375931.

139573157 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 can be written as a sum of positive squares in 2 ways, for example, as 33709636 + 105863521 = 5806^2 + 10289^2 .

It is a cyclic number.

It is not a de Polignac number, because 139573157 - 2¹² = 139569061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139573117) 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, 444344 + ... + 444657.

It is an arithmetic number, because the mean of its divisors is an integer number (35115579).

Almost surely, 2^139573157 is an apocalyptic number.

It is an amenable number.

139573157 is a deficient number, since it is larger than the sum of its proper divisors (889159).

139573157 is an equidigital number, since it uses as much as digits as its factorization.

139573157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 889158.

The product of its digits is 99225, while the sum is 41.

The square root of 139573157 is about 11814.1083878556. The cubic root of 139573157 is about 518.7211635008.

The spelling of 139573157 in words is "one hundred thirty-nine million, five hundred seventy-three thousand, one hundred fifty-seven".