64618439 has 2 divisors, whose sum is σ = 64618440. Its totient is φ = 64618438.

The previous prime is 64618427. The next prime is 64618451. The reversal of 64618439 is 93481646.

It is a balanced prime because it is at equal distance from previous prime (64618427) and next prime (64618451).

It is a cyclic number.

It is not a de Polignac number, because 64618439 - 2¹² = 64614343 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 64618396 and 64618405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64612439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32309219 + 32309220.

It is an arithmetic number, because the mean of its divisors is an integer number (32309220).

Almost surely, 2^64618439 is an apocalyptic number.

64618439 is a deficient number, since it is larger than the sum of its proper divisors (1).

64618439 is an equidigital number, since it uses as much as digits as its factorization.

64618439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 124416, while the sum is 41.

The square root of 64618439 is about 8038.5595102605. The cubic root of 64618439 is about 401.2842866895.

The spelling of 64618439 in words is "sixty-four million, six hundred eighteen thousand, four hundred thirty-nine".