731216349 has 32 divisors (see below), whose sum is σ = 1143014400. Its totient is φ = 460721520.

The previous prime is 731216329. The next prime is 731216351. The reversal of 731216349 is 943612137.

731216349 is a `hidden beast` number, since 7 + 3 + 12 + 1 + 634 + 9 = 666.

It is not a de Polignac number, because 731216349 - 2⁷ = 731216221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (731216309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 250432 + ... + 253334.

It is an arithmetic number, because the mean of its divisors is an integer number (35719200).

Almost surely, 2^731216349 is an apocalyptic number.

It is an amenable number.

731216349 is a deficient number, since it is larger than the sum of its proper divisors (411798051).

731216349 is a wasteful number, since it uses less digits than its factorization.

731216349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3422 (or 3416 counting only the distinct ones).

The product of its digits is 27216, while the sum is 36.

The square root of 731216349 is about 27041.0123516114. The cubic root of 731216349 is about 900.9111550182.

The spelling of 731216349 in words is "seven hundred thirty-one million, two hundred sixteen thousand, three hundred forty-nine".