139188908473 has 4 divisors (see below), whose sum is σ = 139189854580. Its totient is φ = 139187962368.

The previous prime is 139188908461. The next prime is 139188908567. The reversal of 139188908473 is 374809881931.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 35448228729 + 103740679744 = 188277^2 + 322088^2 .

It is a cyclic number.

It is not a de Polignac number, because 139188908473 - 2¹³ = 139188900281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139188008473) 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, 199740 + ... + 564157.

It is an arithmetic number, because the mean of its divisors is an integer number (34797463645).

Almost surely, 2^139188908473 is an apocalyptic number.

It is an amenable number.

139188908473 is a deficient number, since it is larger than the sum of its proper divisors (946107).

139188908473 is an equidigital number, since it uses as much as digits as its factorization.

139188908473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 946106.

The product of its (nonzero) digits is 10450944, while the sum is 61.

The spelling of 139188908473 in words is "one hundred thirty-nine billion, one hundred eighty-eight million, nine hundred eight thousand, four hundred seventy-three".