64947849 has 16 divisors (see below), whose sum is σ = 91108800. Its totient is φ = 41093696.

The previous prime is 64947847. The next prime is 64947851. The reversal of 64947849 is 94874946.

It is an interprime number because it is at equal distance from previous prime (64947847) and next prime (64947851).

It is not a de Polignac number, because 64947849 - 2¹ = 64947847 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64947847) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1194 + ... + 11459.

It is an arithmetic number, because the mean of its divisors is an integer number (5694300).

Almost surely, 2^64947849 is an apocalyptic number.

It is an amenable number.

64947849 is a deficient number, since it is larger than the sum of its proper divisors (26160951).

64947849 is a wasteful number, since it uses less digits than its factorization.

64947849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12744.

The product of its digits is 1741824, while the sum is 51.

The square root of 64947849 is about 8059.0228315845. The cubic root of 64947849 is about 401.9650163859.

The spelling of 64947849 in words is "sixty-four million, nine hundred forty-seven thousand, eight hundred forty-nine".