139054523 has 4 divisors (see below), whose sum is σ = 140285208. Its totient is φ = 137823840.

The previous prime is 139054519. The next prime is 139054583. The reversal of 139054523 is 325450931.

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

It is not a de Polignac number, because 139054523 - 2² = 139054519 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 139054523.

It is not an unprimeable number, because it can be changed into a prime (139054583) 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, 615173 + ... + 615398.

It is an arithmetic number, because the mean of its divisors is an integer number (35071302).

Almost surely, 2^139054523 is an apocalyptic number.

139054523 is a deficient number, since it is larger than the sum of its proper divisors (1230685).

139054523 is a wasteful number, since it uses less digits than its factorization.

139054523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1230684.

The product of its (nonzero) digits is 16200, while the sum is 32.

The square root of 139054523 is about 11792.1381860967. The cubic root of 139054523 is about 518.0778680214.

The spelling of 139054523 in words is "one hundred thirty-nine million, fifty-four thousand, five hundred twenty-three".