161472643 has 2 divisors, whose sum is σ = 161472644. Its totient is φ = 161472642.

The previous prime is 161472617. The next prime is 161472671. The reversal of 161472643 is 346274161.

161472643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (346274161) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161472643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161472599 and 161472608.

It is not a weakly prime, because it can be changed into another prime (161442643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80736321 + 80736322.

It is an arithmetic number, because the mean of its divisors is an integer number (80736322).

Almost surely, 2^161472643 is an apocalyptic number.

161472643 is a deficient number, since it is larger than the sum of its proper divisors (1).

161472643 is an equidigital number, since it uses as much as digits as its factorization.

161472643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 34.

The square root of 161472643 is about 12707.1886347846. The cubic root of 161472643 is about 544.5440093521.

The spelling of 161472643 in words is "one hundred sixty-one million, four hundred seventy-two thousand, six hundred forty-three".