40751891 has 2 divisors, whose sum is σ = 40751892. Its totient is φ = 40751890.

The previous prime is 40751869. The next prime is 40751897. The reversal of 40751891 is 19815704.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40751891 - 2¹⁸ = 40489747 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (40751897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20375945 + 20375946.

It is an arithmetic number, because the mean of its divisors is an integer number (20375946).

Almost surely, 2^40751891 is an apocalyptic number.

40751891 is a deficient number, since it is larger than the sum of its proper divisors (1).

40751891 is an equidigital number, since it uses as much as digits as its factorization.

40751891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 35.

The square root of 40751891 is about 6383.7207802347. The cubic root of 40751891 is about 344.1247603852.

The spelling of 40751891 in words is "forty million, seven hundred fifty-one thousand, eight hundred ninety-one".