129769373 has 4 divisors (see below), whose sum is σ = 136599360. Its totient is φ = 122939388.

The previous prime is 129769369. The next prime is 129769433. The reversal of 129769373 is 373967921.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 373967921 = 17 ⋅21998113.

It is a cyclic number.

It is not a de Polignac number, because 129769373 - 2² = 129769369 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129769333) 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, 3414965 + ... + 3415002.

It is an arithmetic number, because the mean of its divisors is an integer number (34149840).

Almost surely, 2^129769373 is an apocalyptic number.

It is an amenable number.

129769373 is a deficient number, since it is larger than the sum of its proper divisors (6829987).

129769373 is an equidigital number, since it uses as much as digits as its factorization.

129769373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6829986.

The product of its digits is 428652, while the sum is 47.

The square root of 129769373 is about 11391.6360984715. The cubic root of 129769373 is about 506.2799580300.

The spelling of 129769373 in words is "one hundred twenty-nine million, seven hundred sixty-nine thousand, three hundred seventy-three".