720907 has 4 divisors (see below), whose sum is σ = 786456. Its totient is φ = 655360.

The previous prime is 720901. The next prime is 720913. The reversal of 720907 is 709027.

720907 is nontrivially palindromic in base 16.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (720901) and next prime (720913).

It is a cyclic number.

It is not a de Polignac number, because 720907 - 2³ = 720899 is a prime.

It is not an unprimeable number, because it can be changed into a prime (720901) 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, 32758 + ... + 32779.

It is an arithmetic number, because the mean of its divisors is an integer number (196614).

2⁷²⁰⁹⁰⁷ is an apocalyptic number.

720907 is a deficient number, since it is larger than the sum of its proper divisors (65549).

720907 is a wasteful number, since it uses less digits than its factorization.

720907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65548.

The product of its (nonzero) digits is 882, while the sum is 25.

The square root of 720907 is about 849.0624240891. The cubic root of 720907 is about 89.6657146397.

The spelling of 720907 in words is "seven hundred twenty thousand, nine hundred seven".