161292643 has 2 divisors, whose sum is σ = 161292644. Its totient is φ = 161292642.

The previous prime is 161292631. The next prime is 161292671. The reversal of 161292643 is 346292161.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161292643 - 2⁵ = 161292611 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161292599 and 161292608.

It is not a weakly prime, because it can be changed into another prime (161292623) 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, 80646321 + 80646322.

It is an arithmetic number, because the mean of its divisors is an integer number (80646322).

Almost surely, 2^161292643 is an apocalyptic number.

161292643 is a deficient number, since it is larger than the sum of its proper divisors (1).

161292643 is an equidigital number, since it uses as much as digits as its factorization.

161292643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 34.

The square root of 161292643 is about 12700.1040546918. The cubic root of 161292643 is about 544.3415924722.

The spelling of 161292643 in words is "one hundred sixty-one million, two hundred ninety-two thousand, six hundred forty-three".