3712991 has 4 divisors (see below), whose sum is σ = 3754800. Its totient is φ = 3671184.

The previous prime is 3712981. The next prime is 3713027. The reversal of 3712991 is 1992173.

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: 1992173 = 157 ⋅12689.

It is a cyclic number.

It is not a de Polignac number, because 3712991 - 2⁶ = 3712927 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3712981) 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, 20771 + ... + 20948.

It is an arithmetic number, because the mean of its divisors is an integer number (938700).

Almost surely, 2^3712991 is an apocalyptic number.

3712991 is a deficient number, since it is larger than the sum of its proper divisors (41809).

3712991 is an equidigital number, since it uses as much as digits as its factorization.

3712991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41808.

The product of its digits is 3402, while the sum is 32.

The square root of 3712991 is about 1926.9122969144. The cubic root of 3712991 is about 154.8488432739.

The spelling of 3712991 in words is "three million, seven hundred twelve thousand, nine hundred ninety-one".