3964731 has 4 divisors (see below), whose sum is σ = 5286312. Its totient is φ = 2643152.

The previous prime is 3964699. The next prime is 3964733. The reversal of 3964731 is 1374693.

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 3964731 - 2⁵ = 3964699 is a prime.

It is a super-2 number, since 2×3964731² = 31438183804722, which contains 22 as substring.

It is a D-number.

3964731 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 3964692 and 3964701.

It is not an unprimeable number, because it can be changed into a prime (3964733) 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, 660786 + ... + 660791.

It is an arithmetic number, because the mean of its divisors is an integer number (1321578).

Almost surely, 2^3964731 is an apocalyptic number.

3964731 is a deficient number, since it is larger than the sum of its proper divisors (1321581).

3964731 is a wasteful number, since it uses less digits than its factorization.

3964731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1321580.

The product of its digits is 13608, while the sum is 33.

The square root of 3964731 is about 1991.1632278646. The cubic root of 3964731 is about 158.2721768121.

The spelling of 3964731 in words is "three million, nine hundred sixty-four thousand, seven hundred thirty-one".