161198867 has 2 divisors, whose sum is σ = 161198868. Its totient is φ = 161198866.

The previous prime is 161198837. The next prime is 161198903. The reversal of 161198867 is 768891161.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161198867 - 2¹² = 161194771 is a prime.

It is not a weakly prime, because it can be changed into another prime (161198827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80599433 + 80599434.

It is an arithmetic number, because the mean of its divisors is an integer number (80599434).

Almost surely, 2^161198867 is an apocalyptic number.

161198867 is a deficient number, since it is larger than the sum of its proper divisors (1).

161198867 is an equidigital number, since it uses as much as digits as its factorization.

161198867 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 47.

The square root of 161198867 is about 12696.4115796551. The cubic root of 161198867 is about 544.2360781056.

The spelling of 161198867 in words is "one hundred sixty-one million, one hundred ninety-eight thousand, eight hundred sixty-seven".