163997479 has 2 divisors, whose sum is σ = 163997480. Its totient is φ = 163997478.

The previous prime is 163997461. The next prime is 163997489. The reversal of 163997479 is 974799361.

It is a strong prime.

It is an emirp because it is prime and its reverse (974799361) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 163997479 - 2⁹ = 163996967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (163997489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81998739 + 81998740.

It is an arithmetic number, because the mean of its divisors is an integer number (81998740).

Almost surely, 2^163997479 is an apocalyptic number.

163997479 is a deficient number, since it is larger than the sum of its proper divisors (1).

163997479 is an equidigital number, since it uses as much as digits as its factorization.

163997479 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2571912, while the sum is 55.

The square root of 163997479 is about 12806.1500459740. The cubic root of 163997479 is about 547.3675627486.

The spelling of 163997479 in words is "one hundred sixty-three million, nine hundred ninety-seven thousand, four hundred seventy-nine".