40992191 has 2 divisors, whose sum is σ = 40992192. Its totient is φ = 40992190.

The previous prime is 40992179. The next prime is 40992227. The reversal of 40992191 is 19129904.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40992191 - 2¹⁸ = 40730047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40995191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20496095 + 20496096.

It is an arithmetic number, because the mean of its divisors is an integer number (20496096).

Almost surely, 2^40992191 is an apocalyptic number.

40992191 is a deficient number, since it is larger than the sum of its proper divisors (1).

40992191 is an equidigital number, since it uses as much as digits as its factorization.

40992191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 35.

The square root of 40992191 is about 6402.5144279416. The cubic root of 40992191 is about 344.7998306739.

The spelling of 40992191 in words is "forty million, nine hundred ninety-two thousand, one hundred ninety-one".