64407493 has 2 divisors, whose sum is σ = 64407494. Its totient is φ = 64407492.

The previous prime is 64407481. The next prime is 64407503. The reversal of 64407493 is 39470446.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63393444 + 1014049 = 7962^2 + 1007^2 .

It is a cyclic number.

It is not a de Polignac number, because 64407493 - 2⁵ = 64407461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64407403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32203746 + 32203747.

It is an arithmetic number, because the mean of its divisors is an integer number (32203747).

Almost surely, 2^64407493 is an apocalyptic number.

It is an amenable number.

64407493 is a deficient number, since it is larger than the sum of its proper divisors (1).

64407493 is an equidigital number, since it uses as much as digits as its factorization.

64407493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 37.

The square root of 64407493 is about 8025.4279013645. The cubic root of 64407493 is about 400.8471483327.

The spelling of 64407493 in words is "sixty-four million, four hundred seven thousand, four hundred ninety-three".