8722949987 has 4 divisors (see below), whose sum is σ = 8778510336. Its totient is φ = 8667389640.

The previous prime is 8722949971. The next prime is 8722949999. The reversal of 8722949987 is 7899492278.

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 8722949987 - 2⁴ = 8722949971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8722949087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27779939 + ... + 27780252.

It is an arithmetic number, because the mean of its divisors is an integer number (2194627584).

Almost surely, 2^8722949987 is an apocalyptic number.

8722949987 is a deficient number, since it is larger than the sum of its proper divisors (55560349).

8722949987 is a wasteful number, since it uses less digits than its factorization.

8722949987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55560348.

The product of its digits is 36578304, while the sum is 65.

The square root of 8722949987 is about 93396.7343486912. The cubic root of 8722949987 is about 2058.5170137704.

The spelling of 8722949987 in words is "eight billion, seven hundred twenty-two million, nine hundred forty-nine thousand, nine hundred eighty-seven".