64870349 has 2 divisors, whose sum is σ = 64870350. Its totient is φ = 64870348.

The previous prime is 64870343. The next prime is 64870391. The reversal of 64870349 is 94307846.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62694724 + 2175625 = 7918^2 + 1475^2 .

It is a cyclic number.

It is not a de Polignac number, because 64870349 - 2⁸ = 64870093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64870343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32435174 + 32435175.

It is an arithmetic number, because the mean of its divisors is an integer number (32435175).

Almost surely, 2^64870349 is an apocalyptic number.

It is an amenable number.

64870349 is a deficient number, since it is larger than the sum of its proper divisors (1).

64870349 is an equidigital number, since it uses as much as digits as its factorization.

64870349 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 41.

The square root of 64870349 is about 8054.2131210938. The cubic root of 64870349 is about 401.8050691439.

The spelling of 64870349 in words is "sixty-four million, eight hundred seventy thousand, three hundred forty-nine".