64143499 has 12 divisors (see below), whose sum is σ = 79006104. Its totient is φ = 51745344.

The previous prime is 64143491. The next prime is 64143503. The reversal of 64143499 is 99434146.

It is not a de Polignac number, because 64143499 - 2³ = 64143491 is a prime.

It is a super-2 number, since 2×64143499² = 8228776927926002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64143491) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37669 + ... + 39334.

It is an arithmetic number, because the mean of its divisors is an integer number (6583842).

Almost surely, 2^64143499 is an apocalyptic number.

64143499 is a deficient number, since it is larger than the sum of its proper divisors (14862605).

64143499 is a wasteful number, since it uses less digits than its factorization.

64143499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77034 (or 77027 counting only the distinct ones).

The product of its digits is 93312, while the sum is 40.

The square root of 64143499 is about 8008.9636657935. The cubic root of 64143499 is about 400.2987330908.

The spelling of 64143499 in words is "sixty-four million, one hundred forty-three thousand, four hundred ninety-nine".