64436023 has 2 divisors, whose sum is σ = 64436024. Its totient is φ = 64436022.

The previous prime is 64436003. The next prime is 64436077. The reversal of 64436023 is 32063446.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64436023 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 64435982 and 64436000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64436003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32218011 + 32218012.

It is an arithmetic number, because the mean of its divisors is an integer number (32218012).

Almost surely, 2^64436023 is an apocalyptic number.

64436023 is a deficient number, since it is larger than the sum of its proper divisors (1).

64436023 is an equidigital number, since it uses as much as digits as its factorization.

64436023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 28.

The square root of 64436023 is about 8027.2051798867. The cubic root of 64436023 is about 400.9063261314.

Adding to 64436023 its reverse (32063446), we get a palindrome (96499469).

The spelling of 64436023 in words is "sixty-four million, four hundred thirty-six thousand, twenty-three".