8464390139 has 2 divisors, whose sum is σ = 8464390140. Its totient is φ = 8464390138.

The previous prime is 8464390093. The next prime is 8464390147. The reversal of 8464390139 is 9310934648.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8464390139 - 2²⁴ = 8447612923 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8464390093 and 8464390102.

It is not a weakly prime, because it can be changed into another prime (8464390339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4232195069 + 4232195070.

It is an arithmetic number, because the mean of its divisors is an integer number (4232195070).

Almost surely, 2^8464390139 is an apocalyptic number.

8464390139 is a deficient number, since it is larger than the sum of its proper divisors (1).

8464390139 is an equidigital number, since it uses as much as digits as its factorization.

8464390139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 559872, while the sum is 47.

The square root of 8464390139 is about 92002.1202962193. The cubic root of 8464390139 is about 2037.9736172956.

The spelling of 8464390139 in words is "eight billion, four hundred sixty-four million, three hundred ninety thousand, one hundred thirty-nine".