3921967 has 4 divisors (see below), whose sum is σ = 4482256. Its totient is φ = 3361680.

The previous prime is 3921959. The next prime is 3921971. The reversal of 3921967 is 7691293.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 3921967 - 2³ = 3921959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3921997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 280134 + ... + 280147.

It is an arithmetic number, because the mean of its divisors is an integer number (1120564).

Almost surely, 2^3921967 is an apocalyptic number.

3921967 is a deficient number, since it is larger than the sum of its proper divisors (560289).

3921967 is an equidigital number, since it uses as much as digits as its factorization.

3921967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560288.

The product of its digits is 20412, while the sum is 37.

The square root of 3921967 is about 1980.3956675372. The cubic root of 3921967 is about 157.7010718233.

The spelling of 3921967 in words is "three million, nine hundred twenty-one thousand, nine hundred sixty-seven".