64897111 has 4 divisors (see below), whose sum is σ = 64913224. Its totient is φ = 64881000.

The previous prime is 64897097. The next prime is 64897121. The reversal of 64897111 is 11179846.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 64897111 - 2¹¹ = 64895063 is a prime.

It is a super-2 number, since 2×64897111² = 8423270032292642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64897121) 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, 3961 + ... + 12061.

It is an arithmetic number, because the mean of its divisors is an integer number (16228306).

Almost surely, 2^64897111 is an apocalyptic number.

64897111 is a deficient number, since it is larger than the sum of its proper divisors (16113).

64897111 is an equidigital number, since it uses as much as digits as its factorization.

64897111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16112.

The product of its digits is 12096, while the sum is 37.

The square root of 64897111 is about 8055.8743162986. The cubic root of 64897111 is about 401.8603158991.

The spelling of 64897111 in words is "sixty-four million, eight hundred ninety-seven thousand, one hundred eleven".