687148027 has 2 divisors, whose sum is σ = 687148028. Its totient is φ = 687148026.

The previous prime is 687148019. The next prime is 687148031. The reversal of 687148027 is 720841786.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 687148027 - 2³ = 687148019 is a prime.

It is a super-2 number, since 2×687148027² = 944344822019985458, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (687148057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343574013 + 343574014.

It is an arithmetic number, because the mean of its divisors is an integer number (343574014).

Almost surely, 2^687148027 is an apocalyptic number.

687148027 is a deficient number, since it is larger than the sum of its proper divisors (1).

687148027 is an equidigital number, since it uses as much as digits as its factorization.

687148027 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 150528, while the sum is 43.

The square root of 687148027 is about 26213.5084832229. The cubic root of 687148027 is about 882.4364414792.

The spelling of 687148027 in words is "six hundred eighty-seven million, one hundred forty-eight thousand, twenty-seven".