64938361 has 4 divisors (see below), whose sum is σ = 67761792. Its totient is φ = 62114932.

The previous prime is 64938353. The next prime is 64938389. The reversal of 64938361 is 16383946.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 64938361 - 2³ = 64938353 is a prime.

It is a super-3 number, since 3×64938361³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64938311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1411681 + ... + 1411726.

It is an arithmetic number, because the mean of its divisors is an integer number (16940448).

Almost surely, 2^64938361 is an apocalyptic number.

It is an amenable number.

64938361 is a deficient number, since it is larger than the sum of its proper divisors (2823431).

64938361 is a wasteful number, since it uses less digits than its factorization.

64938361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2823430.

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

The square root of 64938361 is about 8058.4341531094. The cubic root of 64938361 is about 401.9454415533.

The spelling of 64938361 in words is "sixty-four million, nine hundred thirty-eight thousand, three hundred sixty-one".