64749287 has 2 divisors, whose sum is σ = 64749288. Its totient is φ = 64749286.

The previous prime is 64749281. The next prime is 64749313. The reversal of 64749287 is 78294746.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64749287 - 2²² = 60554983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64749281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32374643 + 32374644.

It is an arithmetic number, because the mean of its divisors is an integer number (32374644).

Almost surely, 2^64749287 is an apocalyptic number.

64749287 is a deficient number, since it is larger than the sum of its proper divisors (1).

64749287 is an equidigital number, since it uses as much as digits as its factorization.

64749287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 677376, while the sum is 47.

The square root of 64749287 is about 8046.6941659293. The cubic root of 64749287 is about 401.5549619836.

The spelling of 64749287 in words is "sixty-four million, seven hundred forty-nine thousand, two hundred eighty-seven".