64263839 has 2 divisors, whose sum is σ = 64263840. Its totient is φ = 64263838.

The previous prime is 64263827. The next prime is 64263841. The reversal of 64263839 is 93836246.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64263839 - 2²⁰ = 63215263 is a prime.

Together with 64263841, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 64263796 and 64263805.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64263889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32131919 + 32131920.

It is an arithmetic number, because the mean of its divisors is an integer number (32131920).

Almost surely, 2^64263839 is an apocalyptic number.

64263839 is a deficient number, since it is larger than the sum of its proper divisors (1).

64263839 is an equidigital number, since it uses as much as digits as its factorization.

64263839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 186624, while the sum is 41.

The square root of 64263839 is about 8016.4729775631. The cubic root of 64263839 is about 400.5489109806.

The spelling of 64263839 in words is "sixty-four million, two hundred sixty-three thousand, eight hundred thirty-nine".