64898861 has 4 divisors (see below), whose sum is σ = 64970400. Its totient is φ = 64827324.

The previous prime is 64898849. The next prime is 64898881. The reversal of 64898861 is 16889846.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16889846 = 2 ⋅8444923.

It is a cyclic number.

It is not a de Polignac number, because 64898861 - 2⁶ = 64898797 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 (64898881) 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, 34391 + ... + 36228.

It is an arithmetic number, because the mean of its divisors is an integer number (16242600).

Almost surely, 2^64898861 is an apocalyptic number.

It is an amenable number.

64898861 is a deficient number, since it is larger than the sum of its proper divisors (71539).

64898861 is an equidigital number, since it uses as much as digits as its factorization.

64898861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71538.

The product of its digits is 663552, while the sum is 50.

The square root of 64898861 is about 8055.9829319581. The cubic root of 64898861 is about 401.8639280231.

The spelling of 64898861 in words is "sixty-four million, eight hundred ninety-eight thousand, eight hundred sixty-one".