3918667 has 2 divisors, whose sum is σ = 3918668. Its totient is φ = 3918666.

The previous prime is 3918641. The next prime is 3918689. The reversal of 3918667 is 7668193.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3918667 - 2⁷ = 3918539 is a prime.

It is a Chen prime.

3918667 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (3918697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1959333 + 1959334.

It is an arithmetic number, because the mean of its divisors is an integer number (1959334).

Almost surely, 2^3918667 is an apocalyptic number.

3918667 is a deficient number, since it is larger than the sum of its proper divisors (1).

3918667 is an equidigital number, since it uses as much as digits as its factorization.

3918667 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 40.

The square root of 3918667 is about 1979.5623253639. The cubic root of 3918667 is about 157.6568287546.

The spelling of 3918667 in words is "three million, nine hundred eighteen thousand, six hundred sixty-seven".