64424869 has 2 divisors, whose sum is σ = 64424870. Its totient is φ = 64424868.

The previous prime is 64424821. The next prime is 64424891. The reversal of 64424869 is 96842446.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62204769 + 2220100 = 7887^2 + 1490^2 .

It is a cyclic number.

It is not a de Polignac number, because 64424869 - 2⁷ = 64424741 is a prime.

It is a super-2 number, since 2×64424869² = 8301127491334322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64424809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32212434 + 32212435.

It is an arithmetic number, because the mean of its divisors is an integer number (32212435).

Almost surely, 2^64424869 is an apocalyptic number.

It is an amenable number.

64424869 is a deficient number, since it is larger than the sum of its proper divisors (1).

64424869 is an equidigital number, since it uses as much as digits as its factorization.

64424869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 331776, while the sum is 43.

The square root of 64424869 is about 8026.5103874598. The cubic root of 64424869 is about 400.8831922434.

It can be divided in two parts, 6442 and 4869, that added together give a palindrome (11311).

The spelling of 64424869 in words is "sixty-four million, four hundred twenty-four thousand, eight hundred sixty-nine".