171227396479 has 2 divisors, whose sum is σ = 171227396480. Its totient is φ = 171227396478.

The previous prime is 171227396411. The next prime is 171227396489. The reversal of 171227396479 is 974693722171.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 171227396479 - 2²³ = 171219007871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (171227396489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85613698239 + 85613698240.

It is an arithmetic number, because the mean of its divisors is an integer number (85613698240).

Almost surely, 2^171227396479 is an apocalyptic number.

171227396479 is a deficient number, since it is larger than the sum of its proper divisors (1).

171227396479 is an equidigital number, since it uses as much as digits as its factorization.

171227396479 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8001504, while the sum is 58.

The spelling of 171227396479 in words is "one hundred seventy-one billion, two hundred twenty-seven million, three hundred ninety-six thousand, four hundred seventy-nine".