720370961 has 4 divisors (see below), whose sum is σ = 720501312. Its totient is φ = 720240612.

The previous prime is 720370957. The next prime is 720370967. The reversal of 720370961 is 169073027.

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 720370961 - 2² = 720370957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (720370967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56501 + ... + 68066.

It is an arithmetic number, because the mean of its divisors is an integer number (180125328).

Almost surely, 2^720370961 is an apocalyptic number.

It is an amenable number.

720370961 is a deficient number, since it is larger than the sum of its proper divisors (130351).

720370961 is a wasteful number, since it uses less digits than its factorization.

720370961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130350.

The product of its (nonzero) digits is 15876, while the sum is 35.

The square root of 720370961 is about 26839.7272899707. The cubic root of 720370961 is about 896.4348512522.

The spelling of 720370961 in words is "seven hundred twenty million, three hundred seventy thousand, nine hundred sixty-one".