129994599 has 64 divisors (see below), whose sum is σ = 218240000. Its totient is φ = 68584320.

The previous prime is 129994591. The next prime is 129994649. The reversal of 129994599 is 995499921.

It is not a de Polignac number, because 129994599 - 2³ = 129994591 is a prime.

It is a super-4 number, since 4×129994599⁴ (a number of 34 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129994591) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1192557 + ... + 1192665.

It is an arithmetic number, because the mean of its divisors is an integer number (3410000).

Almost surely, 2^129994599 is an apocalyptic number.

129994599 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

129994599 is a deficient number, since it is larger than the sum of its proper divisors (88245401).

129994599 is a wasteful number, since it uses less digits than its factorization.

129994599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213 (or 199 counting only the distinct ones).

The product of its digits is 2361960, while the sum is 57.

The square root of 129994599 is about 11401.5173990132. The cubic root of 129994599 is about 506.5726863335.

The spelling of 129994599 in words is "one hundred twenty-nine million, nine hundred ninety-four thousand, five hundred ninety-nine".