64623943 has 2 divisors, whose sum is σ = 64623944. Its totient is φ = 64623942.

The previous prime is 64623893. The next prime is 64623967. The reversal of 64623943 is 34932646.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64623943 - 2⁹ = 64623431 is a prime.

It is a zygodrome in base 14.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64623743) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32311971 + 32311972.

It is an arithmetic number, because the mean of its divisors is an integer number (32311972).

Almost surely, 2^64623943 is an apocalyptic number.

64623943 is a deficient number, since it is larger than the sum of its proper divisors (1).

64623943 is an equidigital number, since it uses as much as digits as its factorization.

64623943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 93312, while the sum is 37.

The square root of 64623943 is about 8038.9018528652. The cubic root of 64623943 is about 401.2956797533.

The spelling of 64623943 in words is "sixty-four million, six hundred twenty-three thousand, nine hundred forty-three".