64261943 has 4 divisors (see below), whose sum is σ = 64280400. Its totient is φ = 64243488.

The previous prime is 64261937. The next prime is 64261961. The reversal of 64261943 is 34916246.

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 64261943 - 2¹² = 64257847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64261903) 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, 2243 + ... + 11556.

It is an arithmetic number, because the mean of its divisors is an integer number (16070100).

Almost surely, 2^64261943 is an apocalyptic number.

64261943 is a deficient number, since it is larger than the sum of its proper divisors (18457).

64261943 is a wasteful number, since it uses less digits than its factorization.

64261943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18456.

The product of its digits is 31104, while the sum is 35.

The square root of 64261943 is about 8016.3547201955. The cubic root of 64261943 is about 400.5449717606.

The spelling of 64261943 in words is "sixty-four million, two hundred sixty-one thousand, nine hundred forty-three".