3978599 has 4 divisors (see below), whose sum is σ = 4075680. Its totient is φ = 3881520.

The previous prime is 3978593. The next prime is 3978641. The reversal of 3978599 is 9958793.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3978599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3978593) 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, 48479 + ... + 48560.

It is an arithmetic number, because the mean of its divisors is an integer number (1018920).

Almost surely, 2^3978599 is an apocalyptic number.

3978599 is a deficient number, since it is larger than the sum of its proper divisors (97081).

3978599 is an equidigital number, since it uses as much as digits as its factorization.

3978599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97080.

The product of its digits is 612360, while the sum is 50.

The square root of 3978599 is about 1994.6425744980. The cubic root of 3978599 is about 158.4564990567.

The spelling of 3978599 in words is "three million, nine hundred seventy-eight thousand, five hundred ninety-nine".