129772982 has 4 divisors (see below), whose sum is σ = 194659476. Its totient is φ = 64886490.

The previous prime is 129772967. The next prime is 129772987. The reversal of 129772982 is 289277921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 289277921 = 61 ⋅4742261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129772987) 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 as a sum of consecutive naturals, namely, 32443244 + ... + 32443247.

It is an arithmetic number, because the mean of its divisors is an integer number (48664869).

Almost surely, 2^129772982 is an apocalyptic number.

129772982 is a deficient number, since it is larger than the sum of its proper divisors (64886494).

129772982 is an equidigital number, since it uses as much as digits as its factorization.

129772982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64886493.

The product of its digits is 254016, while the sum is 47.

The square root of 129772982 is about 11391.7945030623. The cubic root of 129772982 is about 506.2846513496.

The spelling of 129772982 in words is "one hundred twenty-nine million, seven hundred seventy-two thousand, nine hundred eighty-two".