747491 has 4 divisors (see below), whose sum is σ = 749232. Its totient is φ = 745752.

The previous prime is 747463. The next prime is 747493. The reversal of 747491 is 194747.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 747491 - 2⁶ = 747427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (747493) 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, 290 + ... + 1256.

It is an arithmetic number, because the mean of its divisors is an integer number (187308).

2⁷⁴⁷⁴⁹¹ is an apocalyptic number.

747491 is a deficient number, since it is larger than the sum of its proper divisors (1741).

747491 is an equidigital number, since it uses as much as digits as its factorization.

747491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1740.

The product of its digits is 7056, while the sum is 32.

The square root of 747491 is about 864.5756184395. The cubic root of 747491 is about 90.7546018860.

The spelling of 747491 in words is "seven hundred forty-seven thousand, four hundred ninety-one".