161922659 has 2 divisors, whose sum is σ = 161922660. Its totient is φ = 161922658.

The previous prime is 161922643. The next prime is 161922701. The reversal of 161922659 is 956229161.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161922659 - 2⁴ = 161922643 is a prime.

It is not a weakly prime, because it can be changed into another prime (161942659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80961329 + 80961330.

It is an arithmetic number, because the mean of its divisors is an integer number (80961330).

Almost surely, 2^161922659 is an apocalyptic number.

161922659 is a deficient number, since it is larger than the sum of its proper divisors (1).

161922659 is an equidigital number, since it uses as much as digits as its factorization.

161922659 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58320, while the sum is 41.

The square root of 161922659 is about 12724.8834572266. The cubic root of 161922659 is about 545.0494122357.

The spelling of 161922659 in words is "one hundred sixty-one million, nine hundred twenty-two thousand, six hundred fifty-nine".