129641936 has 20 divisors (see below), whose sum is σ = 251433312. Its totient is φ = 64755936.

The previous prime is 129641929. The next prime is 129641971. The reversal of 129641936 is 639146921.

It is a super-3 number, since 3×129641936³ (a number of 25 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 129641893 and 129641902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15125 + ... + 22091.

Almost surely, 2^129641936 is an apocalyptic number.

129641936 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

129641936 is a deficient number, since it is larger than the sum of its proper divisors (121791376).

129641936 is a wasteful number, since it uses less digits than its factorization.

129641936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8138 (or 8132 counting only the distinct ones).

The product of its digits is 69984, while the sum is 41.

The square root of 129641936 is about 11386.0412786886. The cubic root of 129641936 is about 506.1141769247.

The spelling of 129641936 in words is "one hundred twenty-nine million, six hundred forty-one thousand, nine hundred thirty-six".