7720899 has 4 divisors (see below), whose sum is σ = 10294536. Its totient is φ = 5147264.

The previous prime is 7720877. The next prime is 7720903. The reversal of 7720899 is 9980277.

7720899 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 7720899 - 2¹⁶ = 7655363 is a prime.

It is a super-2 number, since 2×7720899² = 119224562736402, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7720899.

It is not an unprimeable number, because it can be changed into a prime (7720819) 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, 1286814 + ... + 1286819.

It is an arithmetic number, because the mean of its divisors is an integer number (2573634).

Almost surely, 2^7720899 is an apocalyptic number.

7720899 is a deficient number, since it is larger than the sum of its proper divisors (2573637).

7720899 is a wasteful number, since it uses less digits than its factorization.

7720899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2573636.

The product of its (nonzero) digits is 63504, while the sum is 42.

The square root of 7720899 is about 2778.6505717704. The cubic root of 7720899 is about 197.6465738836.

The spelling of 7720899 in words is "seven million, seven hundred twenty thousand, eight hundred ninety-nine".