3749991 has 8 divisors (see below), whose sum is σ = 5714304. Its totient is φ = 2142840.

The previous prime is 3749971. The next prime is 3750001. The reversal of 3749991 is 1999473.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3749991 - 2⁵ = 3749959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3749951) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89265 + ... + 89306.

It is an arithmetic number, because the mean of its divisors is an integer number (714288).

Almost surely, 2^3749991 is an apocalyptic number.

3749991 is a deficient number, since it is larger than the sum of its proper divisors (1964313).

3749991 is a wasteful number, since it uses less digits than its factorization.

3749991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178581.

The product of its digits is 61236, while the sum is 42.

The square root of 3749991 is about 1936.4893493123. The cubic root of 3749991 is about 155.3615010083.

The spelling of 3749991 in words is "three million, seven hundred forty-nine thousand, nine hundred ninety-one".