687523423 has 2 divisors, whose sum is σ = 687523424. Its totient is φ = 687523422.

The previous prime is 687523411. The next prime is 687523433. The reversal of 687523423 is 324325786.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 687523423 - 2⁵ = 687523391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (687523433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343761711 + 343761712.

It is an arithmetic number, because the mean of its divisors is an integer number (343761712).

Almost surely, 2^687523423 is an apocalyptic number.

687523423 is a deficient number, since it is larger than the sum of its proper divisors (1).

687523423 is an equidigital number, since it uses as much as digits as its factorization.

687523423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 241920, while the sum is 40.

The square root of 687523423 is about 26220.6678595340. The cubic root of 687523423 is about 882.5971069115.

The spelling of 687523423 in words is "six hundred eighty-seven million, five hundred twenty-three thousand, four hundred twenty-three".