64494121 has 2 divisors, whose sum is σ = 64494122. Its totient is φ = 64494120.

The previous prime is 64494119. The next prime is 64494137. The reversal of 64494121 is 12149446.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58905625 + 5588496 = 7675^2 + 2364^2 .

It is a cyclic number.

It is not a de Polignac number, because 64494121 - 2¹ = 64494119 is a prime.

Together with 64494119, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (64494181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32247060 + 32247061.

It is an arithmetic number, because the mean of its divisors is an integer number (32247061).

Almost surely, 2^64494121 is an apocalyptic number.

It is an amenable number.

64494121 is a deficient number, since it is larger than the sum of its proper divisors (1).

64494121 is an equidigital number, since it uses as much as digits as its factorization.

64494121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 31.

The square root of 64494121 is about 8030.8231832110. The cubic root of 64494121 is about 401.0267807977.

The spelling of 64494121 in words is "sixty-four million, four hundred ninety-four thousand, one hundred twenty-one".