747091 has 4 divisors (see below), whose sum is σ = 749592. Its totient is φ = 744592.

The previous prime is 747073. The next prime is 747107. The reversal of 747091 is 190747.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-747091 is a prime.

It is an Ulam number.

It is a Duffinian number.

747091 is a lucky number.

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (747391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 730 + ... + 1423.

It is an arithmetic number, because the mean of its divisors is an integer number (187398).

2⁷⁴⁷⁰⁹¹ is an apocalyptic number.

747091 is a deficient number, since it is larger than the sum of its proper divisors (2501).

747091 is a wasteful number, since it uses less digits than its factorization.

747091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2500.

The product of its (nonzero) digits is 1764, while the sum is 28.

The square root of 747091 is about 864.3442601186. The cubic root of 747091 is about 90.7384106908.

The spelling of 747091 in words is "seven hundred forty-seven thousand, ninety-one".