129769533 has 24 divisors (see below), whose sum is σ = 195465088. Its totient is φ = 86033664.

The previous prime is 129769529. The next prime is 129769537. The reversal of 129769533 is 335967921.

It is an interprime number because it is at equal distance from previous prime (129769529) and next prime (129769537).

It is not a de Polignac number, because 129769533 - 2² = 129769529 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129769537) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45516 + ... + 48282.

Almost surely, 2^129769533 is an apocalyptic number.

It is an amenable number.

129769533 is a deficient number, since it is larger than the sum of its proper divisors (65695555).

129769533 is an equidigital number, since it uses as much as digits as its factorization.

129769533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2975 (or 2963 counting only the distinct ones).

The product of its digits is 306180, while the sum is 45.

The square root of 129769533 is about 11391.6431211656. The cubic root of 129769533 is about 506.2801661037.

The spelling of 129769533 in words is "one hundred twenty-nine million, seven hundred sixty-nine thousand, five hundred thirty-three".