787471065 has 20 divisors (see below), whose sum is σ = 1411615524. Its totient is φ = 419984352.

The previous prime is 787471063. The next prime is 787471081. The reversal of 787471065 is 560174787.

It can be written as a sum of positive squares in 2 ways, for example, as 542517264 + 244953801 = 23292^2 + 15651^2 .

It is not a de Polignac number, because 787471065 - 2¹ = 787471063 is a prime.

It is a super-2 number, since 2×787471065² = 1240221356424468450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 787471065.

It is not an unprimeable number, because it can be changed into a prime (787471063) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 971782 + ... + 972591.

Almost surely, 2^787471065 is an apocalyptic number.

It is an amenable number.

787471065 is a deficient number, since it is larger than the sum of its proper divisors (624144459).

787471065 is a wasteful number, since it uses less digits than its factorization.

787471065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1944390 (or 1944381 counting only the distinct ones).

The product of its (nonzero) digits is 329280, while the sum is 45.

The square root of 787471065 is about 28061.9148491332. The cubic root of 787471065 is about 923.4460649313.

The spelling of 787471065 in words is "seven hundred eighty-seven million, four hundred seventy-one thousand, sixty-five".