2647431887 has 2 divisors, whose sum is σ = 2647431888. Its totient is φ = 2647431886.

The previous prime is 2647431841. The next prime is 2647431901. The reversal of 2647431887 is 7881347462.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2647431887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2647431187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1323715943 + 1323715944.

It is an arithmetic number, because the mean of its divisors is an integer number (1323715944).

Almost surely, 2^2647431887 is an apocalyptic number.

2647431887 is a deficient number, since it is larger than the sum of its proper divisors (1).

2647431887 is an equidigital number, since it uses as much as digits as its factorization.

2647431887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1806336, while the sum is 50.

The square root of 2647431887 is about 51453.2009402719. The cubic root of 2647431887 is about 1383.3803371006.

The spelling of 2647431887 in words is "two billion, six hundred forty-seven million, four hundred thirty-one thousand, eight hundred eighty-seven".