139157783 has 4 divisors (see below), whose sum is σ = 141064128. Its totient is φ = 137251440.

The previous prime is 139157773. The next prime is 139157803. The reversal of 139157783 is 387751931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 387751931 = 7 ⋅55393133.

It is a cyclic number.

It is not a de Polignac number, because 139157783 - 2⁶ = 139157719 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 (139157773) 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, 953063 + ... + 953208.

It is an arithmetic number, because the mean of its divisors is an integer number (35266032).

Almost surely, 2^139157783 is an apocalyptic number.

139157783 is a deficient number, since it is larger than the sum of its proper divisors (1906345).

139157783 is an equidigital number, since it uses as much as digits as its factorization.

139157783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1906344.

The product of its digits is 158760, while the sum is 44.

The square root of 139157783 is about 11796.5157143963. The cubic root of 139157783 is about 518.2060754876.

The spelling of 139157783 in words is "one hundred thirty-nine million, one hundred fifty-seven thousand, seven hundred eighty-three".