7720027 has 4 divisors (see below), whose sum is σ = 8822896. Its totient is φ = 6617160.

The previous prime is 7720021. The next prime is 7720039. The reversal of 7720027 is 7200277.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7720027 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7719983 and 7720010.

It is not an unprimeable number, because it can be changed into a prime (7720021) 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, 551424 + ... + 551437.

It is an arithmetic number, because the mean of its divisors is an integer number (2205724).

Almost surely, 2^7720027 is an apocalyptic number.

7720027 is a deficient number, since it is larger than the sum of its proper divisors (1102869).

7720027 is a wasteful number, since it uses less digits than its factorization.

7720027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1102868.

The product of its (nonzero) digits is 1372, while the sum is 25.

The square root of 7720027 is about 2778.4936566420. The cubic root of 7720027 is about 197.6391328545.

The spelling of 7720027 in words is "seven million, seven hundred twenty thousand, twenty-seven".