3969797 has 4 divisors (see below), whose sum is σ = 4275180. Its totient is φ = 3664416.

The previous prime is 3969793. The next prime is 3969809. The reversal of 3969797 is 7979693.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1406596 + 2563201 = 1186^2 + 1601^2 .

It is a cyclic number.

It is not a de Polignac number, because 3969797 - 2² = 3969793 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3969793) 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, 152672 + ... + 152697.

It is an arithmetic number, because the mean of its divisors is an integer number (1068795).

Almost surely, 2^3969797 is an apocalyptic number.

It is an amenable number.

3969797 is a deficient number, since it is larger than the sum of its proper divisors (305383).

3969797 is a wasteful number, since it uses less digits than its factorization.

3969797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305382.

The product of its digits is 642978, while the sum is 50.

The square root of 3969797 is about 1992.4349424762. The cubic root of 3969797 is about 158.3395597428.

The spelling of 3969797 in words is "three million, nine hundred sixty-nine thousand, seven hundred ninety-seven".