3951943 has 4 divisors (see below), whose sum is σ = 4159960. Its totient is φ = 3743928.

The previous prime is 3951923. The next prime is 3951947. The reversal of 3951943 is 3491593.

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

It is a cyclic number.

It is not a de Polignac number, because 3951943 - 2¹⁷ = 3820871 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3951899 and 3951908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3951947) 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, 103980 + ... + 104017.

It is an arithmetic number, because the mean of its divisors is an integer number (1039990).

Almost surely, 2^3951943 is an apocalyptic number.

3951943 is a deficient number, since it is larger than the sum of its proper divisors (208017).

3951943 is a wasteful number, since it uses less digits than its factorization.

3951943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208016.

The product of its digits is 14580, while the sum is 34.

The square root of 3951943 is about 1987.9494460373. The cubic root of 3951943 is about 158.1018277532.

The spelling of 3951943 in words is "three million, nine hundred fifty-one thousand, nine hundred forty-three".