64890053 has 4 divisors (see below), whose sum is σ = 66399168. Its totient is φ = 63380940.

The previous prime is 64890019. The next prime is 64890079. The reversal of 64890053 is 35009846.

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: 35009846 = 2 ⋅17504923.

It is a cyclic number.

It is not a de Polignac number, because 64890053 - 2²² = 60695749 is a prime.

It is a super-3 number, since 3×64890053³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64889995 and 64890022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64890013) 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, 754493 + ... + 754578.

It is an arithmetic number, because the mean of its divisors is an integer number (16599792).

Almost surely, 2^64890053 is an apocalyptic number.

It is an amenable number.

64890053 is a deficient number, since it is larger than the sum of its proper divisors (1509115).

64890053 is a wasteful number, since it uses less digits than its factorization.

64890053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1509114.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 64890053 is about 8055.4362389631. The cubic root of 64890053 is about 401.8457470280.

Adding to 64890053 its reverse (35009846), we get a palindrome (99899899).

The spelling of 64890053 in words is "sixty-four million, eight hundred ninety thousand, fifty-three".