2171398692629 has 2 divisors, whose sum is σ = 2171398692630. Its totient is φ = 2171398692628.

The previous prime is 2171398692493. The next prime is 2171398692641. The reversal of 2171398692629 is 9262968931712.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1323424761604 + 847973931025 = 1150402^2 + 920855^2 .

It is a cyclic number.

It is not a de Polignac number, because 2171398692629 - 2²⁸ = 2171130257173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2171398692649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1085699346314 + 1085699346315.

It is an arithmetic number, because the mean of its divisors is an integer number (1085699346315).

Almost surely, 2^{2171398692629} is an apocalyptic number.

It is an amenable number.

2171398692629 is a deficient number, since it is larger than the sum of its proper divisors (1).

2171398692629 is an equidigital number, since it uses as much as digits as its factorization.

2171398692629 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35271936, while the sum is 65.

The spelling of 2171398692629 in words is "two trillion, one hundred seventy-one billion, three hundred ninety-eight million, six hundred ninety-two thousand, six hundred twenty-nine".