920687309 has 16 divisors (see below), whose sum is σ = 1020615552. Its totient is φ = 826096128.

The previous prime is 920687297. The next prime is 920687311. The reversal of 920687309 is 903786029.

920687309 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 920687309 - 2²⁴ = 903910093 is a prime.

It is a super-2 number, since 2×920687309² = 1695330241907322962, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 920687309.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (920687359) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118622 + ... + 126144.

It is an arithmetic number, because the mean of its divisors is an integer number (63788472).

Almost surely, 2^920687309 is an apocalyptic number.

It is an amenable number.

920687309 is a deficient number, since it is larger than the sum of its proper divisors (99928243).

920687309 is a wasteful number, since it uses less digits than its factorization.

920687309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7876.

The product of its (nonzero) digits is 163296, while the sum is 44.

The square root of 920687309 is about 30342.8296142598. The cubic root of 920687309 is about 972.8309648627.

The spelling of 920687309 in words is "nine hundred twenty million, six hundred eighty-seven thousand, three hundred nine".