687349065 has 16 divisors (see below), whose sum is σ = 1184355648. Its totient is φ = 338387136.

The previous prime is 687349063. The next prime is 687349087. The reversal of 687349065 is 560943786.

It is not a de Polignac number, because 687349065 - 2¹ = 687349063 is a prime.

It is not an unprimeable number, because it can be changed into a prime (687349063) 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, 1762239 + ... + 1762628.

It is an arithmetic number, because the mean of its divisors is an integer number (74022228).

Almost surely, 2^687349065 is an apocalyptic number.

687349065 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

687349065 is a deficient number, since it is larger than the sum of its proper divisors (497006583).

687349065 is a wasteful number, since it uses less digits than its factorization.

687349065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3524888.

The product of its (nonzero) digits is 1088640, while the sum is 48.

The square root of 687349065 is about 26217.3428287460. The cubic root of 687349065 is about 882.5224908466.

The spelling of 687349065 in words is "six hundred eighty-seven million, three hundred forty-nine thousand, sixty-five".