160991903 has 2 divisors, whose sum is σ = 160991904. Its totient is φ = 160991902.

The previous prime is 160991893. The next prime is 160991911. The reversal of 160991903 is 309199061.

160991903 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 is a cyclic number.

It is not a de Polignac number, because 160991903 - 2⁸ = 160991647 is a prime.

It is a super-2 number, since 2×160991903² = 51836785663122818, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (160991923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80495951 + 80495952.

It is an arithmetic number, because the mean of its divisors is an integer number (80495952).

Almost surely, 2^160991903 is an apocalyptic number.

160991903 is a deficient number, since it is larger than the sum of its proper divisors (1).

160991903 is an equidigital number, since it uses as much as digits as its factorization.

160991903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13122, while the sum is 38.

The square root of 160991903 is about 12688.2584699398. The cubic root of 160991903 is about 544.0030625819.

The spelling of 160991903 in words is "one hundred sixty million, nine hundred ninety-one thousand, nine hundred three".