64742423 has 2 divisors, whose sum is σ = 64742424. Its totient is φ = 64742422.

The previous prime is 64742417. The next prime is 64742449. The reversal of 64742423 is 32424746.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64742423 - 2¹² = 64738327 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64742423.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64742473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32371211 + 32371212.

It is an arithmetic number, because the mean of its divisors is an integer number (32371212).

Almost surely, 2^64742423 is an apocalyptic number.

64742423 is a deficient number, since it is larger than the sum of its proper divisors (1).

64742423 is an equidigital number, since it uses as much as digits as its factorization.

64742423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32256, while the sum is 32.

The square root of 64742423 is about 8046.2676440695. The cubic root of 64742423 is about 401.5407720170.

The spelling of 64742423 in words is "sixty-four million, seven hundred forty-two thousand, four hundred twenty-three".