129461279 has 2 divisors, whose sum is σ = 129461280. Its totient is φ = 129461278.

The previous prime is 129461251. The next prime is 129461327. The reversal of 129461279 is 972164921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 129461279 - 2¹² = 129457183 is a prime.

It is a congruent number.

It is a weakly prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64730639 + 64730640.

It is an arithmetic number, because the mean of its divisors is an integer number (64730640).

Almost surely, 2^129461279 is an apocalyptic number.

129461279 is a deficient number, since it is larger than the sum of its proper divisors (1).

129461279 is an equidigital number, since it uses as much as digits as its factorization.

129461279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 41.

The square root of 129461279 is about 11378.1052464811. The cubic root of 129461279 is about 505.8789763523.

The spelling of 129461279 in words is "one hundred twenty-nine million, four hundred sixty-one thousand, two hundred seventy-nine".