161248999 has 2 divisors, whose sum is σ = 161249000. Its totient is φ = 161248998.

The previous prime is 161248993. The next prime is 161249009. The reversal of 161248999 is 999842161.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161248999 - 2²³ = 152860391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161248993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80624499 + 80624500.

It is an arithmetic number, because the mean of its divisors is an integer number (80624500).

Almost surely, 2^161248999 is an apocalyptic number.

161248999 is a deficient number, since it is larger than the sum of its proper divisors (1).

161248999 is an equidigital number, since it uses as much as digits as its factorization.

161248999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 279936, while the sum is 49.

The square root of 161248999 is about 12698.3856848026. The cubic root of 161248999 is about 544.2924904442.

The spelling of 161248999 in words is "one hundred sixty-one million, two hundred forty-eight thousand, nine hundred ninety-nine".