161632199 has 2 divisors, whose sum is σ = 161632200. Its totient is φ = 161632198.

The previous prime is 161632181. The next prime is 161632213. The reversal of 161632199 is 991236161.

It is a strong prime.

It is an emirp because it is prime and its reverse (991236161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 161632199 - 2¹⁶ = 161566663 is a prime.

It is a super-2 number, since 2×161632199² = 52249935507151202, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161632129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80816099 + 80816100.

It is an arithmetic number, because the mean of its divisors is an integer number (80816100).

Almost surely, 2^161632199 is an apocalyptic number.

161632199 is a deficient number, since it is larger than the sum of its proper divisors (1).

161632199 is an equidigital number, since it uses as much as digits as its factorization.

161632199 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17496, while the sum is 38.

The square root of 161632199 is about 12713.4652632553. The cubic root of 161632199 is about 544.7233104400.

The spelling of 161632199 in words is "one hundred sixty-one million, six hundred thirty-two thousand, one hundred ninety-nine".