731728283449 has 4 divisors (see below), whose sum is σ = 731907150480. Its totient is φ = 731549416420.

The previous prime is 731728283437. The next prime is 731728283467. The reversal of 731728283449 is 944382827137.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 731728283449 - 2¹⁵ = 731728250681 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 731728283393 and 731728283402.

It is not an unprimeable number, because it can be changed into a prime (731728283479) 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, 89427379 + ... + 89435560.

It is an arithmetic number, because the mean of its divisors is an integer number (182976787620).

Almost surely, 2^731728283449 is an apocalyptic number.

It is an amenable number.

731728283449 is a deficient number, since it is larger than the sum of its proper divisors (178867031).

731728283449 is a wasteful number, since it uses less digits than its factorization.

731728283449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178867030.

The product of its digits is 16257024, while the sum is 58.

The spelling of 731728283449 in words is "seven hundred thirty-one billion, seven hundred twenty-eight million, two hundred eighty-three thousand, four hundred forty-nine".