64487893 has 2 divisors, whose sum is σ = 64487894. Its totient is φ = 64487892.

The previous prime is 64487879. The next prime is 64487897. The reversal of 64487893 is 39878446.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56205009 + 8282884 = 7497^2 + 2878^2 .

It is a cyclic number.

It is not a de Polignac number, because 64487893 - 2¹⁷ = 64356821 is a prime.

It is a plaindrome in base 11.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64487897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32243946 + 32243947.

It is an arithmetic number, because the mean of its divisors is an integer number (32243947).

Almost surely, 2^64487893 is an apocalyptic number.

It is an amenable number.

64487893 is a deficient number, since it is larger than the sum of its proper divisors (1).

64487893 is an equidigital number, since it uses as much as digits as its factorization.

64487893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1161216, while the sum is 49.

The square root of 64487893 is about 8030.4354178338. The cubic root of 64487893 is about 401.0138717390.

It can be divided in two parts, 6448 and 7893, that added together give a palindrome (14341).

The spelling of 64487893 in words is "sixty-four million, four hundred eighty-seven thousand, eight hundred ninety-three".