720245951 has 4 divisors (see below), whose sum is σ = 721002672. Its totient is φ = 719489232.

The previous prime is 720245927. The next prime is 720245957. The reversal of 720245951 is 159542027.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 159542027 = 31 ⋅5146517.

It is a cyclic number.

It is not a de Polignac number, because 720245951 - 2⁶ = 720245887 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 (720245957) 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, 376931 + ... + 378836.

It is an arithmetic number, because the mean of its divisors is an integer number (180250668).

Almost surely, 2^720245951 is an apocalyptic number.

720245951 is a deficient number, since it is larger than the sum of its proper divisors (756721).

720245951 is an equidigital number, since it uses as much as digits as its factorization.

720245951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 756720.

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 720245951 is about 26837.3983649682. The cubic root of 720245951 is about 896.3829938020.

Adding to 720245951 its reverse (159542027), we get a palindrome (879787978).

The spelling of 720245951 in words is "seven hundred twenty million, two hundred forty-five thousand, nine hundred fifty-one".