129769597 has 4 divisors (see below), whose sum is σ = 131029600. Its totient is φ = 128509596.

The previous prime is 129769589. The next prime is 129769603. The reversal of 129769597 is 795967921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 129769597 - 2³ = 129769589 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 3 ways as a sum of consecutive naturals, for example, 629847 + ... + 630052.

It is an arithmetic number, because the mean of its divisors is an integer number (32757400).

Almost surely, 2^129769597 is an apocalyptic number.

It is an amenable number.

129769597 is a deficient number, since it is larger than the sum of its proper divisors (1260003).

129769597 is a wasteful number, since it uses less digits than its factorization.

129769597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1260002.

The product of its digits is 2143260, while the sum is 55.

The square root of 129769597 is about 11391.6459302420. The cubic root of 129769597 is about 506.2802493331.

The spelling of 129769597 in words is "one hundred twenty-nine million, seven hundred sixty-nine thousand, five hundred ninety-seven".