1687147927 has 2 divisors, whose sum is σ = 1687147928. Its totient is φ = 1687147926.

The previous prime is 1687147919. The next prime is 1687147933. The reversal of 1687147927 is 7297417861.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1687147927 - 2³ = 1687147919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1687147327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 843573963 + 843573964.

It is an arithmetic number, because the mean of its divisors is an integer number (843573964).

Almost surely, 2^1687147927 is an apocalyptic number.

1687147927 is a deficient number, since it is larger than the sum of its proper divisors (1).

1687147927 is an equidigital number, since it uses as much as digits as its factorization.

1687147927 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1185408, while the sum is 52.

The square root of 1687147927 is about 41074.9062932589. The cubic root of 1687147927 is about 1190.4679860247.

The spelling of 1687147927 in words is "one billion, six hundred eighty-seven million, one hundred forty-seven thousand, nine hundred twenty-seven".