64749571 has 2 divisors, whose sum is σ = 64749572. Its totient is φ = 64749570.

The previous prime is 64749569. The next prime is 64749649. The reversal of 64749571 is 17594746.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64749571 - 2¹ = 64749569 is a prime.

Together with 64749569, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (64749541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32374785 + 32374786.

It is an arithmetic number, because the mean of its divisors is an integer number (32374786).

Almost surely, 2^64749571 is an apocalyptic number.

64749571 is a deficient number, since it is larger than the sum of its proper divisors (1).

64749571 is an equidigital number, since it uses as much as digits as its factorization.

64749571 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 211680, while the sum is 43.

The square root of 64749571 is about 8046.7118129084. The cubic root of 64749571 is about 401.5555490760. Note that the first 4 decimals are identical.

The spelling of 64749571 in words is "sixty-four million, seven hundred forty-nine thousand, five hundred seventy-one".