64969739 has 2 divisors, whose sum is σ = 64969740. Its totient is φ = 64969738.

The previous prime is 64969717. The next prime is 64969763. The reversal of 64969739 is 93796946.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64969739 - 2¹² = 64965643 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (64969039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32484869 + 32484870.

It is an arithmetic number, because the mean of its divisors is an integer number (32484870).

Almost surely, 2^64969739 is an apocalyptic number.

64969739 is a deficient number, since it is larger than the sum of its proper divisors (1).

64969739 is an equidigital number, since it uses as much as digits as its factorization.

64969739 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2204496, while the sum is 53.

The square root of 64969739 is about 8060.3808222689. The cubic root of 64969739 is about 402.0101706955.

The spelling of 64969739 in words is "sixty-four million, nine hundred sixty-nine thousand, seven hundred thirty-nine".