40340347 has 2 divisors, whose sum is σ = 40340348. Its totient is φ = 40340346.

The previous prime is 40340329. The next prime is 40340357. The reversal of 40340347 is 74304304.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40340347 - 2⁷ = 40340219 is a prime.

It is not a weakly prime, because it can be changed into another prime (40340317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20170173 + 20170174.

It is an arithmetic number, because the mean of its divisors is an integer number (20170174).

Almost surely, 2^40340347 is an apocalyptic number.

40340347 is a deficient number, since it is larger than the sum of its proper divisors (1).

40340347 is an equidigital number, since it uses as much as digits as its factorization.

40340347 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 25.

The square root of 40340347 is about 6351.4051201289. The cubic root of 40340347 is about 342.9624265041.

The spelling of 40340347 in words is "forty million, three hundred forty thousand, three hundred forty-seven".