64042739 has 2 divisors, whose sum is σ = 64042740. Its totient is φ = 64042738.

The previous prime is 64042729. The next prime is 64042751. The reversal of 64042739 is 93724046.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64042739 - 2¹⁶ = 63977203 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 64042699 and 64042708.

It is not a weakly prime, because it can be changed into another prime (64042729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32021369 + 32021370.

It is an arithmetic number, because the mean of its divisors is an integer number (32021370).

Almost surely, 2^64042739 is an apocalyptic number.

64042739 is a deficient number, since it is larger than the sum of its proper divisors (1).

64042739 is an equidigital number, since it uses as much as digits as its factorization.

64042739 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 64042739 is about 8002.6707416962. The cubic root of 64042739 is about 400.0890197706.

The spelling of 64042739 in words is "sixty-four million, forty-two thousand, seven hundred thirty-nine".