64111387 has 4 divisors (see below), whose sum is σ = 64572760. Its totient is φ = 63650016.

The previous prime is 64111349. The next prime is 64111391. The reversal of 64111387 is 78311146.

64111387 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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-64111387 is a prime.

It is a super-2 number, since 2×64111387² = 8220539886127538, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64112387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 230478 + ... + 230755.

It is an arithmetic number, because the mean of its divisors is an integer number (16143190).

Almost surely, 2^64111387 is an apocalyptic number.

64111387 is a deficient number, since it is larger than the sum of its proper divisors (461373).

64111387 is a wasteful number, since it uses less digits than its factorization.

64111387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461372.

The product of its digits is 4032, while the sum is 31.

The square root of 64111387 is about 8006.9586610648. The cubic root of 64111387 is about 400.2319217548.

The spelling of 64111387 in words is "sixty-four million, one hundred eleven thousand, three hundred eighty-seven".