3918997 has 4 divisors (see below), whose sum is σ = 4125280. Its totient is φ = 3712716.

The previous prime is 3918983. The next prime is 3919007. The reversal of 3918997 is 7998193.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7998193 = 7 ⋅1142599.

It is a cyclic number.

It is not a de Polignac number, because 3918997 - 2⁷ = 3918869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3918197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103113 + ... + 103150.

It is an arithmetic number, because the mean of its divisors is an integer number (1031320).

Almost surely, 2^3918997 is an apocalyptic number.

It is an amenable number.

3918997 is a deficient number, since it is larger than the sum of its proper divisors (206283).

3918997 is a wasteful number, since it uses less digits than its factorization.

3918997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206282.

The product of its digits is 122472, while the sum is 46.

The square root of 3918997 is about 1979.6456753672. The cubic root of 3918997 is about 157.6612541790.

The spelling of 3918997 in words is "three million, nine hundred eighteen thousand, nine hundred ninety-seven".