7720497 has 12 divisors (see below), whose sum is σ = 11203920. Its totient is φ = 5122968.

The previous prime is 7720487. The next prime is 7720507. The reversal of 7720497 is 7940277.

It is an interprime number because it is at equal distance from previous prime (7720487) and next prime (7720507).

It is not a de Polignac number, because 7720497 - 2⁴ = 7720481 is a prime.

7720497 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (7720487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 154 + ... + 3932.

It is an arithmetic number, because the mean of its divisors is an integer number (933660).

Almost surely, 2^7720497 is an apocalyptic number.

It is an amenable number.

7720497 is a deficient number, since it is larger than the sum of its proper divisors (3483423).

7720497 is a wasteful number, since it uses less digits than its factorization.

7720497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4012 (or 4009 counting only the distinct ones).

The product of its (nonzero) digits is 24696, while the sum is 36.

The square root of 7720497 is about 2778.5782335576. The cubic root of 7720497 is about 197.6431435705.

The spelling of 7720497 in words is "seven million, seven hundred twenty thousand, four hundred ninety-seven".