3906997 has 4 divisors (see below), whose sum is σ = 3918240. Its totient is φ = 3895756.

The previous prime is 3906977. The next prime is 3907003. The reversal of 3906997 is 7996093.

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.

It is a cyclic number.

It is not a de Polignac number, because 3906997 - 2¹⁵ = 3874229 is a prime.

It is a Duffinian number.

3906997 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3906907) 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, 5083 + ... + 5800.

It is an arithmetic number, because the mean of its divisors is an integer number (979560).

Almost surely, 2^3906997 is an apocalyptic number.

It is an amenable number.

3906997 is a deficient number, since it is larger than the sum of its proper divisors (11243).

3906997 is a wasteful number, since it uses less digits than its factorization.

3906997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11242.

The product of its (nonzero) digits is 91854, while the sum is 43.

The square root of 3906997 is about 1976.6125062844. The cubic root of 3906997 is about 157.5001696479.

The spelling of 3906997 in words is "three million, nine hundred six thousand, nine hundred ninety-seven".