829172124365479 has 2 divisors, whose sum is σ = 829172124365480. Its totient is φ = 829172124365478.

The previous prime is 829172124365477. The next prime is 829172124365503. The reversal of 829172124365479 is 974563421271928.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 829172124365479 - 2¹ = 829172124365477 is a prime.

It is a super-2 number, since 2×829172124365479² (a number of 31 digits) contains 22 as substring.

Together with 829172124365477, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (829172124365477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 414586062182739 + 414586062182740.

It is an arithmetic number, because the mean of its divisors is an integer number (414586062182740).

Almost surely, 2^{829172124365479} is an apocalyptic number.

829172124365479 is a deficient number, since it is larger than the sum of its proper divisors (1).

829172124365479 is an equidigital number, since it uses as much as digits as its factorization.

829172124365479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 365783040, while the sum is 70.

The spelling of 829172124365479 in words is "eight hundred twenty-nine trillion, one hundred seventy-two billion, one hundred twenty-four million, three hundred sixty-five thousand, four hundred seventy-nine".