1487988977 has 2 divisors, whose sum is σ = 1487988978. Its totient is φ = 1487988976.

The previous prime is 1487988959. The next prime is 1487989033. The reversal of 1487988977 is 7798897841.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1422119521 + 65869456 = 37711^2 + 8116^2 .

It is a cyclic number.

It is not a de Polignac number, because 1487988977 - 2⁶ = 1487988913 is a prime.

It is a super-2 number, since 2×1487988977² = 4428222391347013058, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1487988907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 743994488 + 743994489.

It is an arithmetic number, because the mean of its divisors is an integer number (743994489).

Almost surely, 2^1487988977 is an apocalyptic number.

It is an amenable number.

1487988977 is a deficient number, since it is larger than the sum of its proper divisors (1).

1487988977 is an equidigital number, since it uses as much as digits as its factorization.

1487988977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56899584, while the sum is 68.

The square root of 1487988977 is about 38574.4601647256. The cubic root of 1487988977 is about 1141.6506755736.

The spelling of 1487988977 in words is "one billion, four hundred eighty-seven million, nine hundred eighty-eight thousand, nine hundred seventy-seven".