129418997 has 2 divisors, whose sum is σ = 129418998. Its totient is φ = 129418996.

The previous prime is 129418987. The next prime is 129419021. The reversal of 129418997 is 799814921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 129254161 + 164836 = 11369^2 + 406^2 .

It is a cyclic number.

It is not a de Polignac number, because 129418997 - 2⁴ = 129418981 is a prime.

It is a super-3 number, since 3×129418997³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129418957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64709498 + 64709499.

It is an arithmetic number, because the mean of its divisors is an integer number (64709499).

Almost surely, 2^129418997 is an apocalyptic number.

It is an amenable number.

129418997 is a deficient number, since it is larger than the sum of its proper divisors (1).

129418997 is an equidigital number, since it uses as much as digits as its factorization.

129418997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 50.

The square root of 129418997 is about 11376.2470525213. The cubic root of 129418997 is about 505.8238970677.

The spelling of 129418997 in words is "one hundred twenty-nine million, four hundred eighteen thousand, nine hundred ninety-seven".