3918491 has 2 divisors, whose sum is σ = 3918492. Its totient is φ = 3918490.

The previous prime is 3918443. The next prime is 3918511. The reversal of 3918491 is 1948193.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3918491 - 2¹⁰ = 3917467 is a prime.

It is not a weakly prime, because it can be changed into another prime (3918401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1959245 + 1959246.

It is an arithmetic number, because the mean of its divisors is an integer number (1959246).

Almost surely, 2^3918491 is an apocalyptic number.

3918491 is a deficient number, since it is larger than the sum of its proper divisors (1).

3918491 is an equidigital number, since it uses as much as digits as its factorization.

3918491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 35.

The square root of 3918491 is about 1979.5178705937. The cubic root of 3918491 is about 157.6544684267.

The spelling of 3918491 in words is "three million, nine hundred eighteen thousand, four hundred ninety-one".