129462789 has 32 divisors (see below), whose sum is σ = 192245760. Its totient is φ = 77155200.

The previous prime is 129462779. The next prime is 129462797. The reversal of 129462789 is 987264921.

It is not a de Polignac number, because 129462789 - 2⁸ = 129462533 is a prime.

It is a super-2 number, since 2×129462789² = 33521227471317042, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129462779) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 71554 + ... + 73340.

It is an arithmetic number, because the mean of its divisors is an integer number (6007680).

Almost surely, 2^129462789 is an apocalyptic number.

129462789 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

129462789 is a deficient number, since it is larger than the sum of its proper divisors (62782971).

129462789 is a wasteful number, since it uses less digits than its factorization.

129462789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1881.

The product of its digits is 435456, while the sum is 48.

The square root of 129462789 is about 11378.1716017996. The cubic root of 129462789 is about 505.8809431548.

The spelling of 129462789 in words is "one hundred twenty-nine million, four hundred sixty-two thousand, seven hundred eighty-nine".