1649162887 has 2 divisors, whose sum is σ = 1649162888. Its totient is φ = 1649162886.

The previous prime is 1649162869. The next prime is 1649162897. The reversal of 1649162887 is 7882619461.

It is a strong prime.

It is an emirp because it is prime and its reverse (7882619461) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1649162887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1649162897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 824581443 + 824581444.

It is an arithmetic number, because the mean of its divisors is an integer number (824581444).

Almost surely, 2^1649162887 is an apocalyptic number.

1649162887 is a deficient number, since it is larger than the sum of its proper divisors (1).

1649162887 is an equidigital number, since it uses as much as digits as its factorization.

1649162887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1161216, while the sum is 52.

The square root of 1649162887 is about 40609.8865671895. The cubic root of 1649162887 is about 1181.4658807516.

The spelling of 1649162887 in words is "one billion, six hundred forty-nine million, one hundred sixty-two thousand, eight hundred eighty-seven".