64699043 has 4 divisors (see below), whose sum is σ = 64740768. Its totient is φ = 64657320.

The previous prime is 64699003. The next prime is 64699049. The reversal of 64699043 is 34099646.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64699043 - 2¹⁸ = 64436899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64699049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18443 + ... + 21668.

It is an arithmetic number, because the mean of its divisors is an integer number (16185192).

Almost surely, 2^64699043 is an apocalyptic number.

64699043 is a deficient number, since it is larger than the sum of its proper divisors (41725).

64699043 is a wasteful number, since it uses less digits than its factorization.

64699043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41724.

The product of its (nonzero) digits is 139968, while the sum is 41.

The square root of 64699043 is about 8043.5715325967. The cubic root of 64699043 is about 401.4510692133.

The spelling of 64699043 in words is "sixty-four million, six hundred ninety-nine thousand, forty-three".