161167999 has 8 divisors (see below), whose sum is σ = 167713920. Its totient is φ = 154749336.

The previous prime is 161167997. The next prime is 161168003. The reversal of 161167999 is 999761161.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161167999 - 2¹ = 161167997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161167997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29227 + ... + 34300.

It is an arithmetic number, because the mean of its divisors is an integer number (20964240).

Almost surely, 2^161167999 is an apocalyptic number.

161167999 is a deficient number, since it is larger than the sum of its proper divisors (6545921).

161167999 is an equidigital number, since it uses as much as digits as its factorization.

161167999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63629.

The product of its digits is 183708, while the sum is 49.

The square root of 161167999 is about 12695.1959023876. The cubic root of 161167999 is about 544.2013372666.

The spelling of 161167999 in words is "one hundred sixty-one million, one hundred sixty-seven thousand, nine hundred ninety-nine".