686992943 has 24 divisors (see below), whose sum is σ = 866295648. Its totient is φ = 533250432.

The previous prime is 686992903. The next prime is 686992973. The reversal of 686992943 is 349299686.

It is not a de Polignac number, because 686992943 - 2¹⁰ = 686991919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686992903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 57221 + ... + 68177.

It is an arithmetic number, because the mean of its divisors is an integer number (36095652).

Almost surely, 2^686992943 is an apocalyptic number.

686992943 is a deficient number, since it is larger than the sum of its proper divisors (179302705).

686992943 is a wasteful number, since it uses less digits than its factorization.

686992943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11043 (or 11030 counting only the distinct ones).

The product of its digits is 5038848, while the sum is 56.

The square root of 686992943 is about 26210.5502231449. The cubic root of 686992943 is about 882.3700501222.

The spelling of 686992943 in words is "six hundred eighty-six million, nine hundred ninety-two thousand, nine hundred forty-three".