3900979 has 4 divisors (see below), whose sum is σ = 3925984. Its totient is φ = 3875976.

The previous prime is 3900943. The next prime is 3900989. The reversal of 3900979 is 9790093.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9790093 = 1619 ⋅6047.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3900979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3900929) 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, 12267 + ... + 12580.

It is an arithmetic number, because the mean of its divisors is an integer number (981496).

Almost surely, 2^3900979 is an apocalyptic number.

3900979 is a deficient number, since it is larger than the sum of its proper divisors (25005).

3900979 is a wasteful number, since it uses less digits than its factorization.

3900979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25004.

The product of its (nonzero) digits is 15309, while the sum is 37.

The square root of 3900979 is about 1975.0896182199. The cubic root of 3900979 is about 157.4192615496.

The spelling of 3900979 in words is "three million, nine hundred thousand, nine hundred seventy-nine".