720415791 has 6 divisors (see below), whose sum is σ = 1040600600. Its totient is φ = 480277188.

The previous prime is 720415777. The next prime is 720415811. The reversal of 720415791 is 197514027.

It is a happy number.

It is not a de Polignac number, because 720415791 - 2⁹ = 720415279 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 (720415991) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 40023091 + ... + 40023108.

Almost surely, 2^720415791 is an apocalyptic number.

720415791 is a deficient number, since it is larger than the sum of its proper divisors (320184809).

720415791 is a wasteful number, since it uses less digits than its factorization.

720415791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80046205 (or 80046202 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 36.

The square root of 720415791 is about 26840.5624195917. The cubic root of 720415791 is about 896.4534464589.

The spelling of 720415791 in words is "seven hundred twenty million, four hundred fifteen thousand, seven hundred ninety-one".