129787953 has 4 divisors (see below), whose sum is σ = 173050608. Its totient is φ = 86525300.

The previous prime is 129787951. The next prime is 129787967. The reversal of 129787953 is 359787921.

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 129787953 - 2¹ = 129787951 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 129787896 and 129787905.

It is not an unprimeable number, because it can be changed into a prime (129787951) 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, 21631323 + ... + 21631328.

It is an arithmetic number, because the mean of its divisors is an integer number (43262652).

Almost surely, 2^129787953 is an apocalyptic number.

It is an amenable number.

129787953 is a deficient number, since it is larger than the sum of its proper divisors (43262655).

129787953 is an equidigital number, since it uses as much as digits as its factorization.

129787953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43262654.

The product of its digits is 952560, while the sum is 51.

The square root of 129787953 is about 11392.4515798839. The cubic root of 129787953 is about 506.3041194391.

The spelling of 129787953 in words is "one hundred twenty-nine million, seven hundred eighty-seven thousand, nine hundred fifty-three".