129392847381 has 16 divisors (see below), whose sum is σ = 197282201600. Its totient is φ = 73896714288.

The previous prime is 129392847377. The next prime is 129392847487. The reversal of 129392847381 is 183748293921.

It is a happy number.

It is not a de Polignac number, because 129392847381 - 2² = 129392847377 is a prime.

It is a super-2 number, since 2×129392847381² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129392847301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1714501 + ... + 1788378.

It is an arithmetic number, because the mean of its divisors is an integer number (12330137600).

Almost surely, 2^129392847381 is an apocalyptic number.

It is an amenable number.

129392847381 is a deficient number, since it is larger than the sum of its proper divisors (67889354219).

129392847381 is a wasteful number, since it uses less digits than its factorization.

129392847381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3504648.

The product of its digits is 5225472, while the sum is 57.

The spelling of 129392847381 in words is "one hundred twenty-nine billion, three hundred ninety-two million, eight hundred forty-seven thousand, three hundred eighty-one".