129453992 has 16 divisors (see below), whose sum is σ = 255501600. Its totient is φ = 61320240.

The previous prime is 129453991. The next prime is 129454001. The reversal of 129453992 is 299354921.

It is a happy number.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (129453991) 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, 425684 + ... + 425987.

It is an arithmetic number, because the mean of its divisors is an integer number (15968850).

Almost surely, 2^129453992 is an apocalyptic number.

It is an amenable number.

129453992 is a deficient number, since it is larger than the sum of its proper divisors (126047608).

129453992 is a wasteful number, since it uses less digits than its factorization.

129453992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 851696 (or 851692 counting only the distinct ones).

The product of its digits is 174960, while the sum is 44.

The square root of 129453992 is about 11377.7850216991. The cubic root of 129453992 is about 505.8694846874.

The spelling of 129453992 in words is "one hundred twenty-nine million, four hundred fifty-three thousand, nine hundred ninety-two".