64407149 has 2 divisors, whose sum is σ = 64407150. Its totient is φ = 64407148.

The previous prime is 64407073. The next prime is 64407191. The reversal of 64407149 is 94170446.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44649124 + 19758025 = 6682^2 + 4445^2 .

It is a cyclic number.

It is not a de Polignac number, because 64407149 - 2⁸ = 64406893 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64407449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32203574 + 32203575.

It is an arithmetic number, because the mean of its divisors is an integer number (32203575).

Almost surely, 2^64407149 is an apocalyptic number.

It is an amenable number.

64407149 is a deficient number, since it is larger than the sum of its proper divisors (1).

64407149 is an equidigital number, since it uses as much as digits as its factorization.

64407149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 64407149 is about 8025.4064694569. The cubic root of 64407149 is about 400.8464346907.

The spelling of 64407149 in words is "sixty-four million, four hundred seven thousand, one hundred forty-nine".