687243371 has 16 divisors (see below), whose sum is σ = 717800448. Its totient is φ = 657266400.

The previous prime is 687243341. The next prime is 687243373. The reversal of 687243371 is 173342786.

It is a cyclic number.

It is not a de Polignac number, because 687243371 - 2⁶ = 687243307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (687243373) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1399436 + ... + 1399926.

It is an arithmetic number, because the mean of its divisors is an integer number (44862528).

Almost surely, 2^687243371 is an apocalyptic number.

687243371 is a deficient number, since it is larger than the sum of its proper divisors (30557077).

687243371 is a wasteful number, since it uses less digits than its factorization.

687243371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 962.

The product of its digits is 169344, while the sum is 41.

The square root of 687243371 is about 26215.3270244718. The cubic root of 687243371 is about 882.4772532236.

The spelling of 687243371 in words is "six hundred eighty-seven million, two hundred forty-three thousand, three hundred seventy-one".