161623417 has 2 divisors, whose sum is σ = 161623418. Its totient is φ = 161623416.

The previous prime is 161623339. The next prime is 161623439. The reversal of 161623417 is 714326161.

161623417 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 125910841 + 35712576 = 11221^2 + 5976^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161623417 is a prime.

It is a super-2 number, since 2×161623417² = 52244257845511778, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (161623717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80811708 + 80811709.

It is an arithmetic number, because the mean of its divisors is an integer number (80811709).

Almost surely, 2^161623417 is an apocalyptic number.

It is an amenable number.

161623417 is a deficient number, since it is larger than the sum of its proper divisors (1).

161623417 is an equidigital number, since it uses as much as digits as its factorization.

161623417 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 31.

The square root of 161623417 is about 12713.1198767258. The cubic root of 161623417 is about 544.7134447350.

Adding to 161623417 its reverse (714326161), we get a palindrome (875949578).

The spelling of 161623417 in words is "one hundred sixty-one million, six hundred twenty-three thousand, four hundred seventeen".