161035813 has 2 divisors, whose sum is σ = 161035814. Its totient is φ = 161035812.

The previous prime is 161035807. The next prime is 161035859. The reversal of 161035813 is 318530161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 154181889 + 6853924 = 12417^2 + 2618^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161035813 is a prime.

It is a super-3 number, since 3×161035813³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161035513) 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, 80517906 + 80517907.

It is an arithmetic number, because the mean of its divisors is an integer number (80517907).

Almost surely, 2^161035813 is an apocalyptic number.

It is an amenable number.

161035813 is a deficient number, since it is larger than the sum of its proper divisors (1).

161035813 is an equidigital number, since it uses as much as digits as its factorization.

161035813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 161035813 is about 12689.9886918783. The cubic root of 161035813 is about 544.0525164212.

Adding to 161035813 its reverse (318530161), we get a palindrome (479565974).

The spelling of 161035813 in words is "one hundred sixty-one million, thirty-five thousand, eight hundred thirteen".