161223479 has 2 divisors, whose sum is σ = 161223480. Its totient is φ = 161223478.

The previous prime is 161223451. The next prime is 161223481. The reversal of 161223479 is 974322161.

161223479 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161223479 is a prime.

Together with 161223481, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161223779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80611739 + 80611740.

It is an arithmetic number, because the mean of its divisors is an integer number (80611740).

Almost surely, 2^161223479 is an apocalyptic number.

161223479 is a deficient number, since it is larger than the sum of its proper divisors (1).

161223479 is an equidigital number, since it uses as much as digits as its factorization.

161223479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 35.

The square root of 161223479 is about 12697.3807929037. The cubic root of 161223479 is about 544.2637748609.

The spelling of 161223479 in words is "one hundred sixty-one million, two hundred twenty-three thousand, four hundred seventy-nine".