7720346087 has 4 divisors (see below), whose sum is σ = 7722170736. Its totient is φ = 7718521440.

The previous prime is 7720346077. The next prime is 7720346089. The reversal of 7720346087 is 7806430277.

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

It is a cyclic number.

It is not a de Polignac number, because 7720346087 - 2³² = 3425378791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7720346089) 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, 905963 + ... + 914444.

It is an arithmetic number, because the mean of its divisors is an integer number (1930542684).

Almost surely, 2^7720346087 is an apocalyptic number.

7720346087 is a deficient number, since it is larger than the sum of its proper divisors (1824649).

7720346087 is a wasteful number, since it uses less digits than its factorization.

7720346087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1824648.

The product of its (nonzero) digits is 395136, while the sum is 44.

The square root of 7720346087 is about 87865.4999815058. The cubic root of 7720346087 is about 1976.4185578149.

The spelling of 7720346087 in words is "seven billion, seven hundred twenty million, three hundred forty-six thousand, eighty-seven".