129652499 has 4 divisors (see below), whose sum is σ = 130522800. Its totient is φ = 128782200.

The previous prime is 129652493. The next prime is 129652517. The reversal of 129652499 is 994256921.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 994256921 = 7 ⋅142036703.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129652499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129652493) 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, 434927 + ... + 435224.

It is an arithmetic number, because the mean of its divisors is an integer number (32630700).

Almost surely, 2^129652499 is an apocalyptic number.

129652499 is a deficient number, since it is larger than the sum of its proper divisors (870301).

129652499 is an equidigital number, since it uses as much as digits as its factorization.

129652499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 870300.

The product of its digits is 349920, while the sum is 47.

The square root of 129652499 is about 11386.5051266840. The cubic root of 129652499 is about 506.1279223197.

The spelling of 129652499 in words is "one hundred twenty-nine million, six hundred fifty-two thousand, four hundred ninety-nine".