736018921 has 12 divisors (see below), whose sum is σ = 828750132. Its totient is φ = 652784000.

The previous prime is 736018909. The next prime is 736018931. The reversal of 736018921 is 129810637.

It can be written as a sum of positive squares in 2 ways, for example, as 115261696 + 620757225 = 10736^2 + 24915^2 .

It is not a de Polignac number, because 736018921 - 2⁵ = 736018889 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 (736018901) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 69220 + ... + 79141.

It is an arithmetic number, because the mean of its divisors is an integer number (69062511).

Almost surely, 2^736018921 is an apocalyptic number.

It is an amenable number.

736018921 is a deficient number, since it is larger than the sum of its proper divisors (92731211).

736018921 is a wasteful number, since it uses less digits than its factorization.

736018921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148424 (or 148413 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 736018921 is about 27129.6686489164. The cubic root of 736018921 is about 902.8792239992.

The spelling of 736018921 in words is "seven hundred thirty-six million, eighteen thousand, nine hundred twenty-one".