40160891 has 2 divisors, whose sum is σ = 40160892. Its totient is φ = 40160890.

The previous prime is 40160881. The next prime is 40160899. The reversal of 40160891 is 19806104.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40160891 is a prime.

It is a super-2 number, since 2×40160891² = 3225794331827762, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40160899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20080445 + 20080446.

It is an arithmetic number, because the mean of its divisors is an integer number (20080446).

Almost surely, 2^40160891 is an apocalyptic number.

40160891 is a deficient number, since it is larger than the sum of its proper divisors (1).

40160891 is an equidigital number, since it uses as much as digits as its factorization.

40160891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 40160891 is about 6337.2621059887. The cubic root of 40160891 is about 342.4531088237.

Adding to 40160891 its reverse (19806104), we get a palindrome (59966995).

The spelling of 40160891 in words is "forty million, one hundred sixty thousand, eight hundred ninety-one".