139399397951 has 4 divisors (see below), whose sum is σ = 152072070504. Its totient is φ = 126726725400.

The previous prime is 139399397933. The next prime is 139399397953. The reversal of 139399397951 is 159793993931.

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

It is a de Polignac number, because none of the positive numbers 2^k-139399397951 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 (139399397953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6336336260 + ... + 6336336281.

It is an arithmetic number, because the mean of its divisors is an integer number (38018017626).

Almost surely, 2^139399397951 is an apocalyptic number.

139399397951 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

139399397951 is a deficient number, since it is larger than the sum of its proper divisors (12672672553).

139399397951 is a wasteful number, since it uses less digits than its factorization.

139399397951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12672672552.

The product of its digits is 55801305, while the sum is 68.

The spelling of 139399397951 in words is "one hundred thirty-nine billion, three hundred ninety-nine million, three hundred ninety-seven thousand, nine hundred fifty-one".