129923753 has 4 divisors (see below), whose sum is σ = 130152660. Its totient is φ = 129694848.

The previous prime is 129923743. The next prime is 129923797. The reversal of 129923753 is 357329921.

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: 357329921 = 13 ⋅27486917.

It can be written as a sum of positive squares in 2 ways, for example, as 41319184 + 88604569 = 6428^2 + 9413^2 .

It is a cyclic number.

It is not a de Polignac number, because 129923753 - 2²² = 125729449 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 129923753.

It is not an unprimeable number, because it can be changed into a prime (129923743) 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, 113600 + ... + 114737.

It is an arithmetic number, because the mean of its divisors is an integer number (32538165).

Almost surely, 2^129923753 is an apocalyptic number.

It is an amenable number.

129923753 is a deficient number, since it is larger than the sum of its proper divisors (228907).

129923753 is an equidigital number, since it uses as much as digits as its factorization.

129923753 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228906.

The product of its digits is 102060, while the sum is 41.

The square root of 129923753 is about 11398.4101084318. The cubic root of 129923753 is about 506.4806436116.

It can be divided in two parts, 1299 and 23753, that added together give a palindrome (25052).

The spelling of 129923753 in words is "one hundred twenty-nine million, nine hundred twenty-three thousand, seven hundred fifty-three".