8721382867 has 2 divisors, whose sum is σ = 8721382868. Its totient is φ = 8721382866.

The previous prime is 8721382847. The next prime is 8721382877. The reversal of 8721382867 is 7682831278.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8721382867 - 2¹¹ = 8721380819 is a prime.

It is a super-2 number, since 2×8721382867² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8721382807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4360691433 + 4360691434.

It is an arithmetic number, because the mean of its divisors is an integer number (4360691434).

Almost surely, 2^8721382867 is an apocalyptic number.

8721382867 is a deficient number, since it is larger than the sum of its proper divisors (1).

8721382867 is an equidigital number, since it uses as much as digits as its factorization.

8721382867 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1806336, while the sum is 52.

The square root of 8721382867 is about 93388.3443851533. The cubic root of 8721382867 is about 2058.3937322203.

The spelling of 8721382867 in words is "eight billion, seven hundred twenty-one million, three hundred eighty-two thousand, eight hundred sixty-seven".