84377912129 has 4 divisors (see below), whose sum is σ = 96431899584. Its totient is φ = 72323924676.

The previous prime is 84377912111. The next prime is 84377912147. The reversal of 84377912129 is 92121977348.

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.

It is an interprime number because it is at equal distance from previous prime (84377912111) and next prime (84377912147).

It is a cyclic number.

It is not a de Polignac number, because 84377912129 - 2²⁸ = 84109476673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84377915129) 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, 6026993717 + ... + 6026993730.

It is an arithmetic number, because the mean of its divisors is an integer number (24107974896).

Almost surely, 2^84377912129 is an apocalyptic number.

It is an amenable number.

84377912129 is a deficient number, since it is larger than the sum of its proper divisors (12053987455).

84377912129 is a wasteful number, since it uses less digits than its factorization.

84377912129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12053987454.

The product of its digits is 1524096, while the sum is 53.

The spelling of 84377912129 in words is "eighty-four billion, three hundred seventy-seven million, nine hundred twelve thousand, one hundred twenty-nine".