720770949 has 12 divisors (see below), whose sum is σ = 1041378156. Its totient is φ = 480391872.

The previous prime is 720770933. The next prime is 720770951. The reversal of 720770949 is 949077027.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 553896225 + 166874724 = 23535^2 + 12918^2 .

It is not a de Polignac number, because 720770949 - 2⁴ = 720770933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720770929) 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, 40489 + ... + 55505.

It is an arithmetic number, because the mean of its divisors is an integer number (86781513).

Almost surely, 2^720770949 is an apocalyptic number.

It is an amenable number.

720770949 is a deficient number, since it is larger than the sum of its proper divisors (320607207).

720770949 is a wasteful number, since it uses less digits than its factorization.

720770949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20356 (or 20353 counting only the distinct ones).

The product of its (nonzero) digits is 222264, while the sum is 45.

The square root of 720770949 is about 26847.1776728952. The cubic root of 720770949 is about 896.6007365432.

The spelling of 720770949 in words is "seven hundred twenty million, seven hundred seventy thousand, nine hundred forty-nine".