7123220787 has 16 divisors (see below), whose sum is σ = 9834301440. Its totient is φ = 4580782752.

The previous prime is 7123220747. The next prime is 7123220789. The reversal of 7123220787 is 7870223217.

It is not a de Polignac number, because 7123220787 - 2¹⁶ = 7123155251 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7123220789) 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 15 ways as a sum of consecutive naturals, for example, 56908 + ... + 132230.

It is an arithmetic number, because the mean of its divisors is an integer number (614643840).

Almost surely, 2^7123220787 is an apocalyptic number.

7123220787 is a deficient number, since it is larger than the sum of its proper divisors (2711080653).

7123220787 is a wasteful number, since it uses less digits than its factorization.

7123220787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76442.

The product of its (nonzero) digits is 65856, while the sum is 39.

The square root of 7123220787 is about 84399.1752744066. The cubic root of 7123220787 is about 1924.0903814681.

The spelling of 7123220787 in words is "seven billion, one hundred twenty-three million, two hundred twenty thousand, seven hundred eighty-seven".