129265383 has 32 divisors (see below), whose sum is σ = 197265600. Its totient is φ = 74704896.

The previous prime is 129265373. The next prime is 129265421. The reversal of 129265383 is 383562921.

It is not a de Polignac number, because 129265383 - 2⁵ = 129265351 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129265373) 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, 40303 + ... + 43391.

It is an arithmetic number, because the mean of its divisors is an integer number (6164550).

Almost surely, 2^129265383 is an apocalyptic number.

129265383 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

129265383 is a deficient number, since it is larger than the sum of its proper divisors (68000217).

129265383 is a wasteful number, since it uses less digits than its factorization.

129265383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3171.

The product of its digits is 77760, while the sum is 39.

The square root of 129265383 is about 11369.4935243396. The cubic root of 129265383 is about 505.6236884510.

The spelling of 129265383 in words is "one hundred twenty-nine million, two hundred sixty-five thousand, three hundred eighty-three".