7720051 has 2 divisors, whose sum is σ = 7720052. Its totient is φ = 7720050.

The previous prime is 7720049. The next prime is 7720067. The reversal of 7720051 is 1500277.

It is a weak prime.

It is an emirp because it is prime and its reverse (1500277) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7720051 - 2¹ = 7720049 is a prime.

Together with 7720049, it forms a pair of twin primes.

7720051 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (7720001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3860025 + 3860026.

It is an arithmetic number, because the mean of its divisors is an integer number (3860026).

Almost surely, 2^7720051 is an apocalyptic number.

7720051 is a deficient number, since it is larger than the sum of its proper divisors (1).

7720051 is an equidigital number, since it uses as much as digits as its factorization.

7720051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 490, while the sum is 22.

The square root of 7720051 is about 2778.4979755256. The cubic root of 7720051 is about 197.6393376610.

The spelling of 7720051 in words is "seven million, seven hundred twenty thousand, fifty-one".