129955454 has 4 divisors (see below), whose sum is σ = 194933184. Its totient is φ = 64977726.

The previous prime is 129955447. The next prime is 129955471. The reversal of 129955454 is 454559921.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×129955454² = 33776840048692232, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32488862 + ... + 32488865.

It is an arithmetic number, because the mean of its divisors is an integer number (48733296).

Almost surely, 2^129955454 is an apocalyptic number.

129955454 is a deficient number, since it is larger than the sum of its proper divisors (64977730).

129955454 is an equidigital number, since it uses as much as digits as its factorization.

129955454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64977729.

The product of its digits is 324000, while the sum is 44.

The square root of 129955454 is about 11399.8006122914. The cubic root of 129955454 is about 506.5218335065.

The spelling of 129955454 in words is "one hundred twenty-nine million, nine hundred fifty-five thousand, four hundred fifty-four".