3967787 has 4 divisors (see below), whose sum is σ = 4052256. Its totient is φ = 3883320.

The previous prime is 3967741. The next prime is 3967793. The reversal of 3967787 is 7877693.

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 3967787 - 2²⁰ = 2919211 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47), and also a Moran number because the ratio is a prime number: 84421 = 3967787 / (3 + 9 + 6 + 7 + 7 + 8 + 7).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3967727) 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, 42164 + ... + 42257.

It is an arithmetic number, because the mean of its divisors is an integer number (1013064).

Almost surely, 2^3967787 is an apocalyptic number.

3967787 is a deficient number, since it is larger than the sum of its proper divisors (84469).

3967787 is an equidigital number, since it uses as much as digits as its factorization.

3967787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84468.

The product of its digits is 444528, while the sum is 47.

The square root of 3967787 is about 1991.9304706741. The cubic root of 3967787 is about 158.3128315714.

The spelling of 3967787 in words is "three million, nine hundred sixty-seven thousand, seven hundred eighty-seven".