165220379 has 2 divisors, whose sum is σ = 165220380. Its totient is φ = 165220378.

The previous prime is 165220357. The next prime is 165220387. The reversal of 165220379 is 973022561.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165220379 is a prime.

It is a Chen prime.

It is equal to p_9250577 and since 165220379 and 9250577 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (165220079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82610189 + 82610190.

It is an arithmetic number, because the mean of its divisors is an integer number (82610190).

Almost surely, 2^165220379 is an apocalyptic number.

165220379 is a deficient number, since it is larger than the sum of its proper divisors (1).

165220379 is an equidigital number, since it uses as much as digits as its factorization.

165220379 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 165220379 is about 12853.8079571775. The cubic root of 165220379 is about 548.7247357363.

The spelling of 165220379 in words is "one hundred sixty-five million, two hundred twenty thousand, three hundred seventy-nine".