161675233 has 2 divisors, whose sum is σ = 161675234. Its totient is φ = 161675232.

The previous prime is 161675179. The next prime is 161675243. The reversal of 161675233 is 332576161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 107682129 + 53993104 = 10377^2 + 7348^2 .

It is an emirp because it is prime and its reverse (332576161) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161675233 is a prime.

It is a super-2 number, since 2×161675233² = 52277761931208578, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (161675243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80837616 + 80837617.

It is an arithmetic number, because the mean of its divisors is an integer number (80837617).

Almost surely, 2^161675233 is an apocalyptic number.

It is an amenable number.

161675233 is a deficient number, since it is larger than the sum of its proper divisors (1).

161675233 is an equidigital number, since it uses as much as digits as its factorization.

161675233 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22680, while the sum is 34.

The square root of 161675233 is about 12715.1576081463. The cubic root of 161675233 is about 544.7716497003.

The spelling of 161675233 in words is "one hundred sixty-one million, six hundred seventy-five thousand, two hundred thirty-three".