1487920949 has 2 divisors, whose sum is σ = 1487920950. Its totient is φ = 1487920948.

The previous prime is 1487920939. The next prime is 1487920963. The reversal of 1487920949 is 9490297841.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1030731025 + 457189924 = 32105^2 + 21382^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1487920949 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1487920949.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1487920909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 743960474 + 743960475.

It is an arithmetic number, because the mean of its divisors is an integer number (743960475).

Almost surely, 2^1487920949 is an apocalyptic number.

It is an amenable number.

1487920949 is a deficient number, since it is larger than the sum of its proper divisors (1).

1487920949 is an equidigital number, since it uses as much as digits as its factorization.

1487920949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1306368, while the sum is 53.

The square root of 1487920949 is about 38573.5783795074. The cubic root of 1487920949 is about 1141.6332772826.

The spelling of 1487920949 in words is "one billion, four hundred eighty-seven million, nine hundred twenty thousand, nine hundred forty-nine".