40240843 has 2 divisors, whose sum is σ = 40240844. Its totient is φ = 40240842.

The previous prime is 40240831. The next prime is 40240859. The reversal of 40240843 is 34804204.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40240843 - 2¹³ = 40232651 is a prime.

It is not a weakly prime, because it can be changed into another prime (40240813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20120421 + 20120422.

It is an arithmetic number, because the mean of its divisors is an integer number (20120422).

Almost surely, 2^40240843 is an apocalyptic number.

40240843 is a deficient number, since it is larger than the sum of its proper divisors (1).

40240843 is an equidigital number, since it uses as much as digits as its factorization.

40240843 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3072, while the sum is 25.

The square root of 40240843 is about 6343.5670564754. The cubic root of 40240843 is about 342.6802092123.

The spelling of 40240843 in words is "forty million, two hundred forty thousand, eight hundred forty-three".