40168207 has 2 divisors, whose sum is σ = 40168208. Its totient is φ = 40168206.

The previous prime is 40168159. The next prime is 40168211. The reversal of 40168207 is 70286104.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40168207 is a prime.

It is a super-2 number, since 2×40168207² = 3226969707189698, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40168237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20084103 + 20084104.

It is an arithmetic number, because the mean of its divisors is an integer number (20084104).

Almost surely, 2^40168207 is an apocalyptic number.

40168207 is a deficient number, since it is larger than the sum of its proper divisors (1).

40168207 is an equidigital number, since it uses as much as digits as its factorization.

40168207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 40168207 is about 6337.8393005819. The cubic root of 40168207 is about 342.4739021441.

The spelling of 40168207 in words is "forty million, one hundred sixty-eight thousand, two hundred seven".