40240247 has 2 divisors, whose sum is σ = 40240248. Its totient is φ = 40240246.

The previous prime is 40240243. The next prime is 40240259. The reversal of 40240247 is 74204204.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40240247 - 2² = 40240243 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40240243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20120123 + 20120124.

It is an arithmetic number, because the mean of its divisors is an integer number (20120124).

Almost surely, 2^40240247 is an apocalyptic number.

40240247 is a deficient number, since it is larger than the sum of its proper divisors (1).

40240247 is an equidigital number, since it uses as much as digits as its factorization.

40240247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1792, while the sum is 23.

The square root of 40240247 is about 6343.5200795773. The cubic root of 40240247 is about 342.6785174119.

The spelling of 40240247 in words is "forty million, two hundred forty thousand, two hundred forty-seven".