139304573 has 4 divisors (see below), whose sum is σ = 139416480. Its totient is φ = 139192668.

The previous prime is 139304551. The next prime is 139304587. The reversal of 139304573 is 375403931.

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: 375403931 = 7 ⋅53629133.

It is a cyclic number.

It is not a de Polignac number, because 139304573 - 2⁸ = 139304317 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 (139304773) 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, 54065 + ... + 56582.

It is an arithmetic number, because the mean of its divisors is an integer number (34854120).

Almost surely, 2^139304573 is an apocalyptic number.

It is an amenable number.

139304573 is a deficient number, since it is larger than the sum of its proper divisors (111907).

139304573 is a wasteful number, since it uses less digits than its factorization.

139304573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111906.

The product of its (nonzero) digits is 34020, while the sum is 35.

The square root of 139304573 is about 11802.7358269174. The cubic root of 139304573 is about 518.3882206213.

The spelling of 139304573 in words is "one hundred thirty-nine million, three hundred four thousand, five hundred seventy-three".