1487145769 has 2 divisors, whose sum is σ = 1487145770. Its totient is φ = 1487145768.

The previous prime is 1487145763. The next prime is 1487145791. The reversal of 1487145769 is 9675417841.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1307907225 + 179238544 = 36165^2 + 13388^2 .

It is a cyclic number.

It is not a de Polignac number, because 1487145769 - 2⁷ = 1487145641 is a prime.

It is a super-2 number, since 2×1487145769² = 4423205076509202722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1487145763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 743572884 + 743572885.

It is an arithmetic number, because the mean of its divisors is an integer number (743572885).

Almost surely, 2^1487145769 is an apocalyptic number.

It is an amenable number.

1487145769 is a deficient number, since it is larger than the sum of its proper divisors (1).

1487145769 is an equidigital number, since it uses as much as digits as its factorization.

1487145769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1693440, while the sum is 52.

The square root of 1487145769 is about 38563.5290008578. The cubic root of 1487145769 is about 1141.4349860553.

The spelling of 1487145769 in words is "one billion, four hundred eighty-seven million, one hundred forty-five thousand, seven hundred sixty-nine".