687460733 has 2 divisors, whose sum is σ = 687460734. Its totient is φ = 687460732.

The previous prime is 687460729. The next prime is 687460759. The reversal of 687460733 is 337064786.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 630110404 + 57350329 = 25102^2 + 7573^2 .

It is a cyclic number.

It is not a de Polignac number, because 687460733 - 2² = 687460729 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (687460723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343730366 + 343730367.

It is an arithmetic number, because the mean of its divisors is an integer number (343730367).

Almost surely, 2^687460733 is an apocalyptic number.

It is an amenable number.

687460733 is a deficient number, since it is larger than the sum of its proper divisors (1).

687460733 is an equidigital number, since it uses as much as digits as its factorization.

687460733 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 508032, while the sum is 44.

The square root of 687460733 is about 26219.4724012517. The cubic root of 687460733 is about 882.5702803373.

The spelling of 687460733 in words is "six hundred eighty-seven million, four hundred sixty thousand, seven hundred thirty-three".