731091049 has 8 divisors (see below), whose sum is σ = 806532552. Its totient is φ = 658392960.

The previous prime is 731091019. The next prime is 731091059. The reversal of 731091049 is 940190137.

It can be written as a sum of positive squares in 4 ways, for example, as 37295449 + 693795600 = 6107^2 + 26340^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 731091049 - 2⁵ = 731091017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (731091019) 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, 685294 + ... + 686359.

It is an arithmetic number, because the mean of its divisors is an integer number (100816569).

Almost surely, 2^731091049 is an apocalyptic number.

It is an amenable number.

731091049 is a deficient number, since it is larger than the sum of its proper divisors (75441503).

731091049 is a wasteful number, since it uses less digits than its factorization.

731091049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1371707.

The product of its (nonzero) digits is 6804, while the sum is 34.

The square root of 731091049 is about 27038.6954012208. The cubic root of 731091049 is about 900.8596925400.

The spelling of 731091049 in words is "seven hundred thirty-one million, ninety-one thousand, forty-nine".