161023459 has 2 divisors, whose sum is σ = 161023460. Its totient is φ = 161023458.

The previous prime is 161023367. The next prime is 161023477. The reversal of 161023459 is 954320161.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 161023459 - 2⁹ = 161022947 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 161023459.

It is not a weakly prime, because it can be changed into another prime (161023259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80511729 + 80511730.

It is an arithmetic number, because the mean of its divisors is an integer number (80511730).

Almost surely, 2^161023459 is an apocalyptic number.

161023459 is a deficient number, since it is larger than the sum of its proper divisors (1).

161023459 is an equidigital number, since it uses as much as digits as its factorization.

161023459 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 161023459 is about 12689.5019208793. The cubic root of 161023459 is about 544.0386035808.

The spelling of 161023459 in words is "one hundred sixty-one million, twenty-three thousand, four hundred fifty-nine".