1987049 has 2 divisors, whose sum is σ = 1987050. Its totient is φ = 1987048.

The previous prime is 1987043. The next prime is 1987057. The reversal of 1987049 is 9407891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1517824 + 469225 = 1232^2 + 685^2 .

It is an emirp because it is prime and its reverse (9407891) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1987049 is a prime.

It is a plaindrome in base 11.

It is not a weakly prime, because it can be changed into another prime (1987043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 993524 + 993525.

It is an arithmetic number, because the mean of its divisors is an integer number (993525).

2^1987049 is an apocalyptic number.

It is an amenable number.

1987049 is a deficient number, since it is larger than the sum of its proper divisors (1).

1987049 is an equidigital number, since it uses as much as digits as its factorization.

1987049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 1987049 is about 1409.6272556956. The cubic root of 1987049 is about 125.7195618973.

The spelling of 1987049 in words is "one million, nine hundred eighty-seven thousand, forty-nine".