161330933 has 2 divisors, whose sum is σ = 161330934. Its totient is φ = 161330932.

The previous prime is 161330929. The next prime is 161330951. The reversal of 161330933 is 339033161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85414564 + 75916369 = 9242^2 + 8713^2 .

It is a cyclic number.

It is not a de Polignac number, because 161330933 - 2² = 161330929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161330896 and 161330905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161330233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80665466 + 80665467.

It is an arithmetic number, because the mean of its divisors is an integer number (80665467).

Almost surely, 2^161330933 is an apocalyptic number.

It is an amenable number.

161330933 is a deficient number, since it is larger than the sum of its proper divisors (1).

161330933 is an equidigital number, since it uses as much as digits as its factorization.

161330933 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4374, while the sum is 29.

The square root of 161330933 is about 12701.6114332001. The cubic root of 161330933 is about 544.3846636462.

The spelling of 161330933 in words is "one hundred sixty-one million, three hundred thirty thousand, nine hundred thirty-three".