161663759 has 2 divisors, whose sum is σ = 161663760. Its totient is φ = 161663758.

The previous prime is 161663743. The next prime is 161663773. The reversal of 161663759 is 957366161.

161663759 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 not a de Polignac number, because 161663759 - 2⁴ = 161663743 is a prime.

It is a super-2 number, since 2×161663759² = 52270341948020162, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161669759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80831879 + 80831880.

It is an arithmetic number, because the mean of its divisors is an integer number (80831880).

Almost surely, 2^161663759 is an apocalyptic number.

161663759 is a deficient number, since it is larger than the sum of its proper divisors (1).

161663759 is an equidigital number, since it uses as much as digits as its factorization.

161663759 is an evil number, because the sum of its binary digits is even.

The product of its digits is 204120, while the sum is 44.

The square root of 161663759 is about 12714.7064063627. The cubic root of 161663759 is about 544.7587620166.

The spelling of 161663759 in words is "one hundred sixty-one million, six hundred sixty-three thousand, seven hundred fifty-nine".