129801901469 has 2 divisors, whose sum is σ = 129801901470. Its totient is φ = 129801901468.

The previous prime is 129801901451. The next prime is 129801901477. The reversal of 129801901469 is 964109108921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70588519225 + 59213382244 = 265685^2 + 243338^2 .

It is a cyclic number.

It is not a de Polignac number, because 129801901469 - 2²⁰ = 129800852893 is a prime.

It is a super-2 number, since 2×129801901469² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129801901499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64900950734 + 64900950735.

It is an arithmetic number, because the mean of its divisors is an integer number (64900950735).

Almost surely, 2^129801901469 is an apocalyptic number.

It is an amenable number.

129801901469 is a deficient number, since it is larger than the sum of its proper divisors (1).

129801901469 is an equidigital number, since it uses as much as digits as its factorization.

129801901469 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 279936, while the sum is 50.

The spelling of 129801901469 in words is "one hundred twenty-nine billion, eight hundred one million, nine hundred one thousand, four hundred sixty-nine".