3971199 has 4 divisors (see below), whose sum is σ = 5294936. Its totient is φ = 2647464.

The previous prime is 3971167. The next prime is 3971207. The reversal of 3971199 is 9911793.

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

It is not a de Polignac number, because 3971199 - 2⁵ = 3971167 is a prime.

It is a D-number.

It is a Duffinian number.

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3971119) 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, 661864 + ... + 661869.

It is an arithmetic number, because the mean of its divisors is an integer number (1323734).

Almost surely, 2^3971199 is an apocalyptic number.

3971199 is a deficient number, since it is larger than the sum of its proper divisors (1323737).

3971199 is a wasteful number, since it uses less digits than its factorization.

3971199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1323736.

The product of its digits is 15309, while the sum is 39.

The square root of 3971199 is about 1992.7867422281. The cubic root of 3971199 is about 158.3581976341.

It can be divided in two parts, 397 and 1199, that added together give a triangular number (1596 = T₅₆).

The spelling of 3971199 in words is "three million, nine hundred seventy-one thousand, one hundred ninety-nine".