129721179983 has 8 divisors (see below), whose sum is σ = 135791732736. Its totient is φ = 123768502200.

The previous prime is 129721179977. The next prime is 129721180003. The reversal of 129721179983 is 389971127921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 129721179983 - 2¹² = 129721175887 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129721179943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29466491 + ... + 29470892.

It is an arithmetic number, because the mean of its divisors is an integer number (16973966592).

Almost surely, 2^129721179983 is an apocalyptic number.

129721179983 is a deficient number, since it is larger than the sum of its proper divisors (6070552753).

129721179983 is an equidigital number, since it uses as much as digits as its factorization.

129721179983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58937485.

The product of its digits is 3429216, while the sum is 59.

The spelling of 129721179983 in words is "one hundred twenty-nine billion, seven hundred twenty-one million, one hundred seventy-nine thousand, nine hundred eighty-three".