731320033 has 4 divisors (see below), whose sum is σ = 743308948. Its totient is φ = 719331120.

The previous prime is 731320021. The next prime is 731320099. The reversal of 731320033 is 330023137.

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

It can be written as a sum of positive squares in 2 ways, for example, as 82955664 + 648364369 = 9108^2 + 25463^2 .

It is a cyclic number.

It is not a de Polignac number, because 731320033 - 2⁵ = 731320001 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 731319986 and 731320013.

It is not an unprimeable number, because it can be changed into a prime (731320333) 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, 5994366 + ... + 5994487.

It is an arithmetic number, because the mean of its divisors is an integer number (185827237).

Almost surely, 2^731320033 is an apocalyptic number.

It is an amenable number.

731320033 is a deficient number, since it is larger than the sum of its proper divisors (11988915).

731320033 is a wasteful number, since it uses less digits than its factorization.

731320033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11988914.

The product of its (nonzero) digits is 1134, while the sum is 22.

The square root of 731320033 is about 27042.9294456056. The cubic root of 731320033 is about 900.9537350551.

The spelling of 731320033 in words is "seven hundred thirty-one million, three hundred twenty thousand, thirty-three".