139422007 has 4 divisors (see below), whose sum is σ = 139604080. Its totient is φ = 139239936.

The previous prime is 139422001. The next prime is 139422011. The reversal of 139422007 is 700224931.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139422007 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 (139422001) 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, 89883 + ... + 91420.

It is an arithmetic number, because the mean of its divisors is an integer number (34901020).

Almost surely, 2^139422007 is an apocalyptic number.

139422007 is a deficient number, since it is larger than the sum of its proper divisors (182073).

139422007 is an equidigital number, since it uses as much as digits as its factorization.

139422007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182072.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 139422007 is about 11807.7096424328. The cubic root of 139422007 is about 518.5338471017.

Adding to 139422007 its reverse (700224931), we get a palindrome (839646938).

The spelling of 139422007 in words is "one hundred thirty-nine million, four hundred twenty-two thousand, seven".