129072398461 has 2 divisors, whose sum is σ = 129072398462. Its totient is φ = 129072398460.

The previous prime is 129072398419. The next prime is 129072398509. The reversal of 129072398461 is 164893270921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 114457039225 + 14615359236 = 338315^2 + 120894^2 .

It is an emirp because it is prime and its reverse (164893270921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 129072398461 - 2¹³ = 129072390269 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 129072398399 and 129072398408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129072398401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64536199230 + 64536199231.

It is an arithmetic number, because the mean of its divisors is an integer number (64536199231).

Almost surely, 2^129072398461 is an apocalyptic number.

It is an amenable number.

129072398461 is a deficient number, since it is larger than the sum of its proper divisors (1).

129072398461 is an equidigital number, since it uses as much as digits as its factorization.

129072398461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1306368, while the sum is 52.

The spelling of 129072398461 in words is "one hundred twenty-nine billion, seventy-two million, three hundred ninety-eight thousand, four hundred sixty-one".