129191036 has 36 divisors (see below), whose sum is σ = 246197952. Its totient is φ = 59289984.

The previous prime is 129191011. The next prime is 129191053. The reversal of 129191036 is 630191921.

It is a junction number, because it is equal to n+sod(n) for n = 129190993 and 129191011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 150320 + ... + 151176.

It is an arithmetic number, because the mean of its divisors is an integer number (6838832).

Almost surely, 2^129191036 is an apocalyptic number.

It is an amenable number.

129191036 is a deficient number, since it is larger than the sum of its proper divisors (117006916).

129191036 is a wasteful number, since it uses less digits than its factorization.

129191036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1110 (or 1095 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 32.

The square root of 129191036 is about 11366.2234713206. The cubic root of 129191036 is about 505.5267333531.

The spelling of 129191036 in words is "one hundred twenty-nine million, one hundred ninety-one thousand, thirty-six".