687064033 has 4 divisors (see below), whose sum is σ = 687116848. Its totient is φ = 687011220.

The previous prime is 687064009. The next prime is 687064051. The reversal of 687064033 is 330460786.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 687064033 - 2²¹ = 684966881 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 687063983 and 687064001.

It is not an unprimeable number, because it can be changed into a prime (687064633) 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, 8398 + ... + 38008.

It is an arithmetic number, because the mean of its divisors is an integer number (171779212).

Almost surely, 2^687064033 is an apocalyptic number.

It is an amenable number.

687064033 is a deficient number, since it is larger than the sum of its proper divisors (52815).

687064033 is a wasteful number, since it uses less digits than its factorization.

687064033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52814.

The product of its (nonzero) digits is 72576, while the sum is 37.

The square root of 687064033 is about 26211.9063213647. The cubic root of 687064033 is about 882.4004849440.

The spelling of 687064033 in words is "six hundred eighty-seven million, sixty-four thousand, thirty-three".