161146399 has 2 divisors, whose sum is σ = 161146400. Its totient is φ = 161146398.

The previous prime is 161146393. The next prime is 161146411. The reversal of 161146399 is 993641161.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161146399 - 2⁵ = 161146367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161146393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80573199 + 80573200.

It is an arithmetic number, because the mean of its divisors is an integer number (80573200).

Almost surely, 2^161146399 is an apocalyptic number.

161146399 is a deficient number, since it is larger than the sum of its proper divisors (1).

161146399 is an equidigital number, since it uses as much as digits as its factorization.

161146399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34992, while the sum is 40.

The square root of 161146399 is about 12694.3451583766. The cubic root of 161146399 is about 544.1770245946.

The spelling of 161146399 in words is "one hundred sixty-one million, one hundred forty-six thousand, three hundred ninety-nine".