129797299 has 4 divisors (see below), whose sum is σ = 129994920. Its totient is φ = 129599680.

The previous prime is 129797293. The next prime is 129797321. The reversal of 129797299 is 992797921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 992797921 = 23 ⋅43165127.

It is a cyclic number.

It is not a de Polignac number, because 129797299 - 2⁹ = 129796787 is a prime.

It is a super-3 number, since 3×129797299³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129797293) 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, 97822 + ... + 99139.

It is an arithmetic number, because the mean of its divisors is an integer number (32498730).

Almost surely, 2^129797299 is an apocalyptic number.

129797299 is a deficient number, since it is larger than the sum of its proper divisors (197621).

129797299 is an equidigital number, since it uses as much as digits as its factorization.

129797299 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197620.

The product of its digits is 1285956, while the sum is 55.

The square root of 129797299 is about 11392.8617563806. The cubic root of 129797299 is about 506.3162720943.

It can be divided in two parts, 1297 and 97299, that added together give a square (98596 = 314²).

The spelling of 129797299 in words is "one hundred twenty-nine million, seven hundred ninety-seven thousand, two hundred ninety-nine".