172338455479 has 2 divisors, whose sum is σ = 172338455480. Its totient is φ = 172338455478.

The previous prime is 172338455477. The next prime is 172338455507. The reversal of 172338455479 is 974554833271.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 172338455479 - 2¹ = 172338455477 is a prime.

Together with 172338455477, 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 (172338455473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86169227739 + 86169227740.

It is an arithmetic number, because the mean of its divisors is an integer number (86169227740).

Almost surely, 2^172338455479 is an apocalyptic number.

172338455479 is a deficient number, since it is larger than the sum of its proper divisors (1).

172338455479 is an equidigital number, since it uses as much as digits as its factorization.

172338455479 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25401600, while the sum is 58.

The spelling of 172338455479 in words is "one hundred seventy-two billion, three hundred thirty-eight million, four hundred fifty-five thousand, four hundred seventy-nine".