64143699 has 8 divisors (see below), whose sum is σ = 85615872. Its totient is φ = 42717000.

The previous prime is 64143697. The next prime is 64143701. The reversal of 64143699 is 99634146.

64143699 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (64143697) and next prime (64143701).

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

It is not a de Polignac number, because 64143699 - 2¹ = 64143697 is a prime.

It is a super-2 number, since 2×64143699² = 8228828242805202, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64143699.

It is not an unprimeable number, because it can be changed into a prime (64143697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7927 + ... + 13824.

It is an arithmetic number, because the mean of its divisors is an integer number (10701984).

Almost surely, 2^64143699 is an apocalyptic number.

64143699 is a deficient number, since it is larger than the sum of its proper divisors (21472173).

64143699 is a wasteful number, since it uses less digits than its factorization.

64143699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22737.

The product of its digits is 139968, while the sum is 42.

The square root of 64143699 is about 8008.9761517937. The cubic root of 64143699 is about 400.2991491354.

The spelling of 64143699 in words is "sixty-four million, one hundred forty-three thousand, six hundred ninety-nine".