129000901 has 2 divisors, whose sum is σ = 129000902. Its totient is φ = 129000900.

The previous prime is 129000877. The next prime is 129000923. The reversal of 129000901 is 109000921.

It is an a-pointer prime, because the next prime (129000923) can be obtained adding 129000901 to its sum of digits (22).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 125104225 + 3896676 = 11185^2 + 1974^2 .

It is an emirp because it is prime and its reverse (109000921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 129000901 - 2¹³ = 128992709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129000941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64500450 + 64500451.

It is an arithmetic number, because the mean of its divisors is an integer number (64500451).

Almost surely, 2^129000901 is an apocalyptic number.

It is an amenable number.

129000901 is a deficient number, since it is larger than the sum of its proper divisors (1).

129000901 is an equidigital number, since it uses as much as digits as its factorization.

129000901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 22.

The square root of 129000901 is about 11357.8563558446. The cubic root of 129000901 is about 505.2786110875.

The spelling of 129000901 in words is "one hundred twenty-nine million, nine hundred one", and thus it is an aban number.