3925687 has 4 divisors (see below), whose sum is σ = 3966256. Its totient is φ = 3885120.

The previous prime is 3925667. The next prime is 3925693. The reversal of 3925687 is 7865293.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7865293 = 29 ⋅271217.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3925687 is a prime.

It is a super-2 number, since 2×3925687² = 30822036843938, which contains 22 as substring.

It is a Duffinian number.

3925687 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3925637) 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, 20139 + ... + 20332.

It is an arithmetic number, because the mean of its divisors is an integer number (991564).

Almost surely, 2^3925687 is an apocalyptic number.

3925687 is a deficient number, since it is larger than the sum of its proper divisors (40569).

3925687 is an equidigital number, since it uses as much as digits as its factorization.

3925687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40568.

The product of its digits is 90720, while the sum is 40.

The square root of 3925687 is about 1981.3346511884. The cubic root of 3925687 is about 157.7509160814.

The spelling of 3925687 in words is "three million, nine hundred twenty-five thousand, six hundred eighty-seven".