3903961 has 4 divisors (see below), whose sum is σ = 3987072. Its totient is φ = 3820852.

The previous prime is 3903947. The next prime is 3903973. The reversal of 3903961 is 1693093.

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 3903961 - 2⁵ = 3903929 is a prime.

It is a super-2 number, since 2×3903961² = 30481822979042, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3903901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41485 + ... + 41578.

It is an arithmetic number, because the mean of its divisors is an integer number (996768).

Almost surely, 2^3903961 is an apocalyptic number.

It is an amenable number.

3903961 is a deficient number, since it is larger than the sum of its proper divisors (83111).

3903961 is an equidigital number, since it uses as much as digits as its factorization.

3903961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83110.

The product of its (nonzero) digits is 4374, while the sum is 31.

The square root of 3903961 is about 1975.8443764629. The cubic root of 3903961 is about 157.4593629938.

The spelling of 3903961 in words is "three million, nine hundred three thousand, nine hundred sixty-one".