10161891 has 12 divisors (see below), whose sum is σ = 15036840. Its totient is φ = 6609120.

The previous prime is 10161881. The next prime is 10161901. The reversal of 10161891 is 19816101.

It is an interprime number because it is at equal distance from previous prime (10161881) and next prime (10161901).

It is not a de Polignac number, because 10161891 - 2⁷ = 10161763 is a prime.

It is not an unprimeable number, because it can be changed into a prime (10161821) 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 in 11 ways as a sum of consecutive naturals, for example, 13401 + ... + 14138.

It is an arithmetic number, because the mean of its divisors is an integer number (1253070).

Almost surely, 2^10161891 is an apocalyptic number.

10161891 is a deficient number, since it is larger than the sum of its proper divisors (4874949).

10161891 is a wasteful number, since it uses less digits than its factorization.

10161891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27586 (or 27583 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 27.

The square root of 10161891 is about 3187.7721060327. The cubic root of 10161891 is about 216.5998629025.

Adding to 10161891 its reverse (19816101), we get a palindrome (29977992).

The spelling of 10161891 in words is "ten million, one hundred sixty-one thousand, eight hundred ninety-one".