787672509 has 64 divisors (see below), whose sum is σ = 1258467840. Its totient is φ = 433520640.

The previous prime is 787672507. The next prime is 787672537. The reversal of 787672509 is 905276787.

It is not a de Polignac number, because 787672509 - 2¹ = 787672507 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (787672507) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1364829 + ... + 1365405.

It is an arithmetic number, because the mean of its divisors is an integer number (19663560).

Almost surely, 2^787672509 is an apocalyptic number.

787672509 is the 15002-nd nonagonal number.

It is an amenable number.

787672509 is a deficient number, since it is larger than the sum of its proper divisors (470795331).

787672509 is a wasteful number, since it uses less digits than its factorization.

787672509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 710.

The product of its (nonzero) digits is 1481760, while the sum is 51.

The square root of 787672509 is about 28065.5038971332. The cubic root of 787672509 is about 923.5248008651.

The spelling of 787672509 in words is "seven hundred eighty-seven million, six hundred seventy-two thousand, five hundred nine".