64847131 has 2 divisors, whose sum is σ = 64847132. Its totient is φ = 64847130.

The previous prime is 64847113. The next prime is 64847137. The reversal of 64847131 is 13174846.

It is a happy number.

Together with previous prime (64847113) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64847131 - 2¹¹ = 64845083 is a prime.

It is a super-2 number, since 2×64847131² = 8410300797862322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (64847137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32423565 + 32423566.

It is an arithmetic number, because the mean of its divisors is an integer number (32423566).

Almost surely, 2^64847131 is an apocalyptic number.

64847131 is a deficient number, since it is larger than the sum of its proper divisors (1).

64847131 is an equidigital number, since it uses as much as digits as its factorization.

64847131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 34.

The square root of 64847131 is about 8052.7716346610. The cubic root of 64847131 is about 401.7571262163.

The spelling of 64847131 in words is "sixty-four million, eight hundred forty-seven thousand, one hundred thirty-one".