64291919 has 2 divisors, whose sum is σ = 64291920. Its totient is φ = 64291918.

The previous prime is 64291907. The next prime is 64291933. The reversal of 64291919 is 91919246.

It is a happy number.

64291919 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64291919 - 2¹² = 64287823 is a prime.

It is a super-2 number, since 2×64291919² = 8266901697405122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64291939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32145959 + 32145960.

It is an arithmetic number, because the mean of its divisors is an integer number (32145960).

Almost surely, 2^64291919 is an apocalyptic number.

64291919 is a deficient number, since it is larger than the sum of its proper divisors (1).

64291919 is an equidigital number, since it uses as much as digits as its factorization.

64291919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34992, while the sum is 41.

The square root of 64291919 is about 8018.2241799541. The cubic root of 64291919 is about 400.6072422589.

The spelling of 64291919 in words is "sixty-four million, two hundred ninety-one thousand, nine hundred nineteen".