687630433 has 8 divisors (see below), whose sum is σ = 832090752. Its totient is φ = 554726976.

The previous prime is 687630431. The next prime is 687630497. The reversal of 687630433 is 334036786.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 687630433 - 2¹ = 687630431 is a prime.

It is a super-2 number, since 2×687630433² = 945671224775534978, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (687630431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2889085 + ... + 2889322.

It is an arithmetic number, because the mean of its divisors is an integer number (104011344).

Almost surely, 2^687630433 is an apocalyptic number.

It is an amenable number.

687630433 is a deficient number, since it is larger than the sum of its proper divisors (144460319).

687630433 is a wasteful number, since it uses less digits than its factorization.

687630433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5778431.

The product of its (nonzero) digits is 217728, while the sum is 40.

The square root of 687630433 is about 26222.7083460119. The cubic root of 687630433 is about 882.6428953233.

The spelling of 687630433 in words is "six hundred eighty-seven million, six hundred thirty thousand, four hundred thirty-three".