64943494 has 16 divisors (see below), whose sum is σ = 121453056. Its totient is φ = 25302600.

The previous prime is 64943491. The next prime is 64943507. The reversal of 64943494 is 49434946.

64943494 = 297² + 298² + ... + 604².

It is a self number, because there is not a number n which added to its sum of digits gives 64943494.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64943491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 210702 + ... + 211009.

It is an arithmetic number, because the mean of its divisors is an integer number (7590816).

Almost surely, 2^64943494 is an apocalyptic number.

64943494 is a deficient number, since it is larger than the sum of its proper divisors (56509562).

64943494 is a wasteful number, since it uses less digits than its factorization.

64943494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421731.

The product of its digits is 373248, while the sum is 43.

The square root of 64943494 is about 8058.7526330072. The cubic root of 64943494 is about 401.9560317580.

The spelling of 64943494 in words is "sixty-four million, nine hundred forty-three thousand, four hundred ninety-four".