720926849 has 4 divisors (see below), whose sum is σ = 721047600. Its totient is φ = 720806100.

The previous prime is 720926839. The next prime is 720926873. The reversal of 720926849 is 948629027.

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 720926849 - 2⁸ = 720926593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (720926839) 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, 50927 + ... + 63524.

It is an arithmetic number, because the mean of its divisors is an integer number (180261900).

Almost surely, 2^720926849 is an apocalyptic number.

It is an amenable number.

720926849 is a deficient number, since it is larger than the sum of its proper divisors (120751).

720926849 is a wasteful number, since it uses less digits than its factorization.

720926849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120750.

The product of its (nonzero) digits is 435456, while the sum is 47.

The square root of 720926849 is about 26850.0809868425. The cubic root of 720926849 is about 896.6653756532.

The spelling of 720926849 in words is "seven hundred twenty million, nine hundred twenty-six thousand, eight hundred forty-nine".