687151 has 2 divisors, whose sum is σ = 687152. Its totient is φ = 687150.

The previous prime is 687139. The next prime is 687161. The reversal of 687151 is 151786.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 687151 - 2⁷ = 687023 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (687101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343575 + 343576.

It is an arithmetic number, because the mean of its divisors is an integer number (343576).

2⁶⁸⁷¹⁵¹ is an apocalyptic number.

687151 is a deficient number, since it is larger than the sum of its proper divisors (1).

687151 is an equidigital number, since it uses as much as digits as its factorization.

687151 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1680, while the sum is 28.

The square root of 687151 is about 828.9457159549. The cubic root of 687151 is about 88.2437714121.

It can be divided in two parts, 687 and 151, that added together give a palindrome (838).

The spelling of 687151 in words is "six hundred eighty-seven thousand, one hundred fifty-one".