64969553 has 4 divisors (see below), whose sum is σ = 70875888. Its totient is φ = 59063220.

The previous prime is 64969511. The next prime is 64969571. The reversal of 64969553 is 35596946.

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 64969553 - 2¹² = 64965457 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 64969498 and 64969507.

It is not an unprimeable number, because it can be changed into a prime (64969253) 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, 2953151 + ... + 2953172.

It is an arithmetic number, because the mean of its divisors is an integer number (17718972).

Almost surely, 2^64969553 is an apocalyptic number.

It is an amenable number.

64969553 is a deficient number, since it is larger than the sum of its proper divisors (5906335).

64969553 is a wasteful number, since it uses less digits than its factorization.

64969553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5906334.

The product of its digits is 874800, while the sum is 47.

The square root of 64969553 is about 8060.3692843442. The cubic root of 64969553 is about 402.0097870607.

The spelling of 64969553 in words is "sixty-four million, nine hundred sixty-nine thousand, five hundred fifty-three".