720042097 has 4 divisors (see below), whose sum is σ = 720271216. Its totient is φ = 719812980.

The previous prime is 720042083. The next prime is 720042133. The reversal of 720042097 is 790240027.

It is a happy number.

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 720042097 - 2⁷ = 720041969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (720042007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109779 + ... + 116152.

It is an arithmetic number, because the mean of its divisors is an integer number (180067804).

Almost surely, 2^720042097 is an apocalyptic number.

It is an amenable number.

720042097 is a deficient number, since it is larger than the sum of its proper divisors (229119).

720042097 is a wasteful number, since it uses less digits than its factorization.

720042097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229118.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 720042097 is about 26833.6001498122. The cubic root of 720042097 is about 896.2984169058.

The spelling of 720042097 in words is "seven hundred twenty million, forty-two thousand, ninety-seven".