3961831 has 8 divisors (see below), whose sum is σ = 4114944. Its totient is φ = 3810360.

The previous prime is 3961817. The next prime is 3961847. The reversal of 3961831 is 1381693.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3961831 - 2¹⁵ = 3929063 is a prime.

It is a super-2 number, since 2×3961831² = 31392209745122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 3961793 and 3961802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3961231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6756 + ... + 7318.

It is an arithmetic number, because the mean of its divisors is an integer number (514368).

Almost surely, 2^3961831 is an apocalyptic number.

3961831 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

3961831 is a deficient number, since it is larger than the sum of its proper divisors (153113).

3961831 is a wasteful number, since it uses less digits than its factorization.

3961831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 821.

The product of its digits is 3888, while the sum is 31.

The square root of 3961831 is about 1990.4348771060. The cubic root of 3961831 is about 158.2335780381.

The spelling of 3961831 in words is "three million, nine hundred sixty-one thousand, eight hundred thirty-one".