731618733 has 4 divisors (see below), whose sum is σ = 975491648. Its totient is φ = 487745820.

The previous prime is 731618729. The next prime is 731618743. The reversal of 731618733 is 337816137.

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, and also an emirpimes, since its reverse is a distinct semiprime: 337816137 = 3 ⋅112605379.

It is not a de Polignac number, because 731618733 - 2² = 731618729 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 731618691 and 731618700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (731618743) 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 3 ways as a sum of consecutive naturals, for example, 121936453 + ... + 121936458.

It is an arithmetic number, because the mean of its divisors is an integer number (243872912).

Almost surely, 2^731618733 is an apocalyptic number.

It is an amenable number.

731618733 is a deficient number, since it is larger than the sum of its proper divisors (243872915).

731618733 is a wasteful number, since it uses less digits than its factorization.

731618733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243872914.

The product of its digits is 63504, while the sum is 39.

The square root of 731618733 is about 27048.4515822995. The cubic root of 731618733 is about 901.0763800613.

The spelling of 731618733 in words is "seven hundred thirty-one million, six hundred eighteen thousand, seven hundred thirty-three".