64943902 has 8 divisors (see below), whose sum is σ = 97508736. Its totient is φ = 32440992.

The previous prime is 64943897. The next prime is 64943903. The reversal of 64943902 is 20934946.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64943903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12763 + ... + 17110.

It is an arithmetic number, because the mean of its divisors is an integer number (12188592).

Almost surely, 2^64943902 is an apocalyptic number.

64943902 is a deficient number, since it is larger than the sum of its proper divisors (32564834).

64943902 is a wasteful number, since it uses less digits than its factorization.

64943902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30962.

The product of its (nonzero) digits is 46656, while the sum is 37.

The square root of 64943902 is about 8058.7779470587. Note that the first 3 decimals coincide. The cubic root of 64943902 is about 401.9568735036.

It can be divided in two parts, 649 and 43902, that added together give a triangular number (44551 = T₂₉₈).

The spelling of 64943902 in words is "sixty-four million, nine hundred forty-three thousand, nine hundred two".