64872239 has 2 divisors, whose sum is σ = 64872240. Its totient is φ = 64872238.

The previous prime is 64872191. The next prime is 64872263. The reversal of 64872239 is 93227846.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64872239 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 64872196 and 64872205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64872439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32436119 + 32436120.

It is an arithmetic number, because the mean of its divisors is an integer number (32436120).

Almost surely, 2^64872239 is an apocalyptic number.

64872239 is a deficient number, since it is larger than the sum of its proper divisors (1).

64872239 is an equidigital number, since it uses as much as digits as its factorization.

64872239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 41.

The square root of 64872239 is about 8054.3304501367. The cubic root of 64872239 is about 401.8089713078.

The spelling of 64872239 in words is "sixty-four million, eight hundred seventy-two thousand, two hundred thirty-nine".