129969927 has 10 divisors (see below), whose sum is σ = 194152728. Its totient is φ = 86646564.

The previous prime is 129969923. The next prime is 129969943. The reversal of 129969927 is 729969921.

It is not a de Polignac number, because 129969927 - 2² = 129969923 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129969923) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 802203 + ... + 802364.

Almost surely, 2^129969927 is an apocalyptic number.

129969927 is a deficient number, since it is larger than the sum of its proper divisors (64182801).

129969927 is an equidigital number, since it uses as much as digits as its factorization.

129969927 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1604579 (or 1604570 counting only the distinct ones).

The product of its digits is 1102248, while the sum is 54.

The square root of 129969927 is about 11400.4353864227. The cubic root of 129969927 is about 506.5406364069.

The spelling of 129969927 in words is "one hundred twenty-nine million, nine hundred sixty-nine thousand, nine hundred twenty-seven".