129776172974213 has 2 divisors, whose sum is σ = 129776172974214. Its totient is φ = 129776172974212.

The previous prime is 129776172974101. The next prime is 129776172974233. The reversal of 129776172974213 is 312479271677921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74897220045124 + 54878952929089 = 8654318^2 + 7408033^2 .

It is a cyclic number.

It is not a de Polignac number, because 129776172974213 - 2¹² = 129776172970117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129776172974233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64888086487106 + 64888086487107.

It is an arithmetic number, because the mean of its divisors is an integer number (64888086487107).

Almost surely, 2^{129776172974213} is an apocalyptic number.

It is an amenable number.

129776172974213 is a deficient number, since it is larger than the sum of its proper divisors (1).

129776172974213 is an equidigital number, since it uses as much as digits as its factorization.

129776172974213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 112021056, while the sum is 68.

The spelling of 129776172974213 in words is "one hundred twenty-nine trillion, seven hundred seventy-six billion, one hundred seventy-two million, nine hundred seventy-four thousand, two hundred thirteen".