687098543 has 2 divisors, whose sum is σ = 687098544. Its totient is φ = 687098542.

The previous prime is 687098521. The next prime is 687098561. The reversal of 687098543 is 345890786.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 687098543 - 2¹⁴ = 687082159 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 687098491 and 687098500.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (687098513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343549271 + 343549272.

It is an arithmetic number, because the mean of its divisors is an integer number (343549272).

Almost surely, 2^687098543 is an apocalyptic number.

687098543 is a deficient number, since it is larger than the sum of its proper divisors (1).

687098543 is an equidigital number, since it uses as much as digits as its factorization.

687098543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1451520, while the sum is 50.

The square root of 687098543 is about 26212.5646017325. The cubic root of 687098543 is about 882.4152584970.

The spelling of 687098543 in words is "six hundred eighty-seven million, ninety-eight thousand, five hundred forty-three".