161623333 has 2 divisors, whose sum is σ = 161623334. Its totient is φ = 161623332.

The previous prime is 161623321. The next prime is 161623339. The reversal of 161623333 is 333326161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119399329 + 42224004 = 10927^2 + 6498^2 .

It is a cyclic number.

It is not a de Polignac number, because 161623333 - 2⁹ = 161622821 is a prime.

It is a super-2 number, since 2×161623333² = 52244203540057778, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161623339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80811666 + 80811667.

It is an arithmetic number, because the mean of its divisors is an integer number (80811667).

Almost surely, 2^161623333 is an apocalyptic number.

It is an amenable number.

161623333 is a deficient number, since it is larger than the sum of its proper divisors (1).

161623333 is an equidigital number, since it uses as much as digits as its factorization.

161623333 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5832, while the sum is 28.

The square root of 161623333 is about 12713.1165730516. The cubic root of 161623333 is about 544.7133503677.

Adding to 161623333 its reverse (333326161), we get a palindrome (494949494).

The spelling of 161623333 in words is "one hundred sixty-one million, six hundred twenty-three thousand, three hundred thirty-three".