727138733 has 4 divisors (see below), whose sum is σ = 727304160. Its totient is φ = 726973308.

The previous prime is 727138703. The next prime is 727138757. The reversal of 727138733 is 337831727.

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: 337831727 = 1987 ⋅170021.

It is a cyclic number.

It is not a de Polignac number, because 727138733 - 2⁶ = 727138669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (727138703) 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, 75935 + ... + 84972.

It is an arithmetic number, because the mean of its divisors is an integer number (181826040).

Almost surely, 2^727138733 is an apocalyptic number.

It is an amenable number.

727138733 is a deficient number, since it is larger than the sum of its proper divisors (165427).

727138733 is a wasteful number, since it uses less digits than its factorization.

727138733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165426.

The product of its digits is 148176, while the sum is 41.

The square root of 727138733 is about 26965.5100637833. The cubic root of 727138733 is about 899.2333937039.

The spelling of 727138733 in words is "seven hundred twenty-seven million, one hundred thirty-eight thousand, seven hundred thirty-three".