64361399 has 4 divisors (see below), whose sum is σ = 65243136. Its totient is φ = 63479664.

The previous prime is 64361347. The next prime is 64361413. The reversal of 64361399 is 99316346.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64361399 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 (64361699) 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, 440759 + ... + 440904.

It is an arithmetic number, because the mean of its divisors is an integer number (16310784).

Almost surely, 2^64361399 is an apocalyptic number.

64361399 is a deficient number, since it is larger than the sum of its proper divisors (881737).

64361399 is an equidigital number, since it uses as much as digits as its factorization.

64361399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 881736.

The product of its digits is 104976, while the sum is 41.

The square root of 64361399 is about 8022.5556401935. Note that the first 3 decimals coincide. The cubic root of 64361399 is about 400.7515018117.

The spelling of 64361399 in words is "sixty-four million, three hundred sixty-one thousand, three hundred ninety-nine".