8664739 has 2 divisors, whose sum is σ = 8664740. Its totient is φ = 8664738.

The previous prime is 8664731. The next prime is 8664743. The reversal of 8664739 is 9374668.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8664739 - 2³ = 8664731 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8664695 and 8664704.

It is not a weakly prime, because it can be changed into another prime (8664731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4332369 + 4332370.

It is an arithmetic number, because the mean of its divisors is an integer number (4332370).

Almost surely, 2^8664739 is an apocalyptic number.

8664739 is a deficient number, since it is larger than the sum of its proper divisors (1).

8664739 is an equidigital number, since it uses as much as digits as its factorization.

8664739 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 43.

The square root of 8664739 is about 2943.5928726643. The cubic root of 8664739 is about 205.3927746356.

The spelling of 8664739 in words is "eight million, six hundred sixty-four thousand, seven hundred thirty-nine".