3891579 has 4 divisors (see below), whose sum is σ = 5188776. Its totient is φ = 2594384.

The previous prime is 3891571. The next prime is 3891593. The reversal of 3891579 is 9751983.

It is a happy number.

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 3891579 - 2³ = 3891571 is a prime.

It is a super-2 number, since 2×3891579² = 30288774226482, which contains 22 as substring.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 3891579.

It is not an unprimeable number, because it can be changed into a prime (3891571) 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, 648594 + ... + 648599.

It is an arithmetic number, because the mean of its divisors is an integer number (1297194).

Almost surely, 2^3891579 is an apocalyptic number.

3891579 is a deficient number, since it is larger than the sum of its proper divisors (1297197).

3891579 is a wasteful number, since it uses less digits than its factorization.

3891579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1297196.

The product of its digits is 68040, while the sum is 42.

The square root of 3891579 is about 1972.7085441088. The cubic root of 3891579 is about 157.2927179985.

The spelling of 3891579 in words is "three million, eight hundred ninety-one thousand, five hundred seventy-nine".