129417091 has 2 divisors, whose sum is σ = 129417092. Its totient is φ = 129417090.

The previous prime is 129417077. The next prime is 129417121. The reversal of 129417091 is 190714921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 129417091 - 2⁵ = 129417059 is a prime.

It is not a weakly prime, because it can be changed into another prime (129417011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64708545 + 64708546.

It is an arithmetic number, because the mean of its divisors is an integer number (64708546).

Almost surely, 2^129417091 is an apocalyptic number.

129417091 is a deficient number, since it is larger than the sum of its proper divisors (1).

129417091 is an equidigital number, since it uses as much as digits as its factorization.

129417091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 34.

The square root of 129417091 is about 11376.1632811770. The cubic root of 129417091 is about 505.8214139055.

The spelling of 129417091 in words is "one hundred twenty-nine million, four hundred seventeen thousand, ninety-one".