129779464 has 32 divisors (see below), whose sum is σ = 247595040. Its totient is φ = 63763200.

The previous prime is 129779453. The next prime is 129779467. The reversal of 129779464 is 464977921.

It is a super-2 number, since 2×129779464² = 33685418552254592, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (129779467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 159619 + ... + 160429.

It is an arithmetic number, because the mean of its divisors is an integer number (7737345).

Almost surely, 2^129779464 is an apocalyptic number.

It is an amenable number.

129779464 is a deficient number, since it is larger than the sum of its proper divisors (117815576).

129779464 is a wasteful number, since it uses less digits than its factorization.

129779464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1141 (or 1137 counting only the distinct ones).

The product of its digits is 762048, while the sum is 49.

The square root of 129779464 is about 11392.0790025351. The cubic root of 129779464 is about 506.2930806401.

The spelling of 129779464 in words is "one hundred twenty-nine million, seven hundred seventy-nine thousand, four hundred sixty-four".