3979961 has 4 divisors (see below), whose sum is σ = 3983952. Its totient is φ = 3975972.

The previous prime is 3979957. The next prime is 3979967. The reversal of 3979961 is 1699793.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 3979961 - 2² = 3979957 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3979967) 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, 986 + ... + 2988.

It is an arithmetic number, because the mean of its divisors is an integer number (995988).

Almost surely, 2^3979961 is an apocalyptic number.

It is an amenable number.

3979961 is a deficient number, since it is larger than the sum of its proper divisors (3991).

3979961 is a wasteful number, since it uses less digits than its factorization.

3979961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3990.

The product of its digits is 91854, while the sum is 44.

The square root of 3979961 is about 1994.9839598353. The cubic root of 3979961 is about 158.4745785472.

The spelling of 3979961 in words is "three million, nine hundred seventy-nine thousand, nine hundred sixty-one".