64291439 has 2 divisors, whose sum is σ = 64291440. Its totient is φ = 64291438.

The previous prime is 64291393. The next prime is 64291511. The reversal of 64291439 is 93419246.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64291439 - 2¹² = 64287343 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 (64291039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32145719 + 32145720.

It is an arithmetic number, because the mean of its divisors is an integer number (32145720).

Almost surely, 2^64291439 is an apocalyptic number.

64291439 is a deficient number, since it is larger than the sum of its proper divisors (1).

64291439 is an equidigital number, since it uses as much as digits as its factorization.

64291439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46656, while the sum is 38.

The square root of 64291439 is about 8018.1942480835. The cubic root of 64291439 is about 400.6062452858.

The spelling of 64291439 in words is "sixty-four million, two hundred ninety-one thousand, four hundred thirty-nine".