3917923 has 2 divisors, whose sum is σ = 3917924. Its totient is φ = 3917922.

The previous prime is 3917909. The next prime is 3917989. The reversal of 3917923 is 3297193.

3917923 is nontrivially palindromic in base 9.

It is a weak prime.

It is an emirp because it is prime and its reverse (3297193) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3917923 - 2⁹ = 3917411 is a prime.

It is a super-3 number, since 3×3917923³ (a number of 21 digits) contains 333 as substring.

It is an Ulam number.

It is equal to p₂₇₇₇₇₄ and since 3917923 and 277774 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (3917323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1958961 + 1958962.

It is an arithmetic number, because the mean of its divisors is an integer number (1958962).

Almost surely, 2^3917923 is an apocalyptic number.

3917923 is a deficient number, since it is larger than the sum of its proper divisors (1).

3917923 is an equidigital number, since it uses as much as digits as its factorization.

3917923 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10206, while the sum is 34.

The square root of 3917923 is about 1979.3743961161. The cubic root of 3917923 is about 157.6468505227.

The spelling of 3917923 in words is "three million, nine hundred seventeen thousand, nine hundred twenty-three".