3979807 has 4 divisors (see below), whose sum is σ = 4285960. Its totient is φ = 3673656.

The previous prime is 3979771. The next prime is 3979837. The reversal of 3979807 is 7089793.

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 3979807 - 2¹⁹ = 3455519 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 (3979837) 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, 153057 + ... + 153082.

It is an arithmetic number, because the mean of its divisors is an integer number (1071490).

Almost surely, 2^3979807 is an apocalyptic number.

3979807 is a deficient number, since it is larger than the sum of its proper divisors (306153).

3979807 is a wasteful number, since it uses less digits than its factorization.

3979807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306152.

The product of its (nonzero) digits is 95256, while the sum is 43.

The square root of 3979807 is about 1994.9453626603. The cubic root of 3979807 is about 158.4725345239.

The spelling of 3979807 in words is "three million, nine hundred seventy-nine thousand, eight hundred seven".