3758991 has 4 divisors (see below), whose sum is σ = 5011992. Its totient is φ = 2505992.

The previous prime is 3758971. The next prime is 3758999. The reversal of 3758991 is 1998573.

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: 1998573 = 3 ⋅666191.

It is a cyclic number.

It is not a de Polignac number, because 3758991 - 2⁶ = 3758927 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3758999) 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, 626496 + ... + 626501.

It is an arithmetic number, because the mean of its divisors is an integer number (1252998).

Almost surely, 2^3758991 is an apocalyptic number.

3758991 is a deficient number, since it is larger than the sum of its proper divisors (1253001).

3758991 is a wasteful number, since it uses less digits than its factorization.

3758991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1253000.

The product of its digits is 68040, while the sum is 42.

The square root of 3758991 is about 1938.8117495002. The cubic root of 3758991 is about 155.4856912079.

The spelling of 3758991 in words is "three million, seven hundred fifty-eight thousand, nine hundred ninety-one".