749191 has 4 divisors (see below), whose sum is σ = 753192. Its totient is φ = 745192.

The previous prime is 749183. The next prime is 749197. The reversal of 749191 is 191947.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 749191 - 2³ = 749183 is a prime.

It is a super-2 number, since 2×749191² = 1122574308962, 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 a congruent number.

It is not an unprimeable number, because it can be changed into a prime (749197) 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, 1705 + ... + 2098.

It is an arithmetic number, because the mean of its divisors is an integer number (188298).

2⁷⁴⁹¹⁹¹ is an apocalyptic number.

749191 is a deficient number, since it is larger than the sum of its proper divisors (4001).

749191 is a wasteful number, since it uses less digits than its factorization.

749191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4000.

The product of its digits is 2268, while the sum is 31.

The square root of 749191 is about 865.5582013938. The cubic root of 749191 is about 90.8233500985.

The spelling of 749191 in words is "seven hundred forty-nine thousand, one hundred ninety-one".