161423747 has 2 divisors, whose sum is σ = 161423748. Its totient is φ = 161423746.

The previous prime is 161423741. The next prime is 161423767. The reversal of 161423747 is 747324161.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161423747 - 2⁸ = 161423491 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (161423741) 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, 80711873 + 80711874.

It is an arithmetic number, because the mean of its divisors is an integer number (80711874).

Almost surely, 2^161423747 is an apocalyptic number.

161423747 is a deficient number, since it is larger than the sum of its proper divisors (1).

161423747 is an equidigital number, since it uses as much as digits as its factorization.

161423747 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28224, while the sum is 35.

The square root of 161423747 is about 12705.2645387650. The cubic root of 161423747 is about 544.4890388188.

The spelling of 161423747 in words is "one hundred sixty-one million, four hundred twenty-three thousand, seven hundred forty-seven".