920509713 has 12 divisors (see below), whose sum is σ = 1339332228. Its totient is φ = 609192960.

The previous prime is 920509649. The next prime is 920509781. The reversal of 920509713 is 317905029.

It can be written as a sum of positive squares in 2 ways, for example, as 656999424 + 263510289 = 25632^2 + 16233^2 .

It is not a de Polignac number, because 920509713 - 2⁶ = 920509649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (920509313) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 372048 + ... + 374513.

It is an arithmetic number, because the mean of its divisors is an integer number (111611019).

Almost surely, 2^920509713 is an apocalyptic number.

It is an amenable number.

920509713 is a deficient number, since it is larger than the sum of its proper divisors (418822515).

920509713 is a wasteful number, since it uses less digits than its factorization.

920509713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 746704 (or 746701 counting only the distinct ones).

The product of its (nonzero) digits is 17010, while the sum is 36.

The square root of 920509713 is about 30339.9029827058. The cubic root of 920509713 is about 972.7684094231.

The spelling of 920509713 in words is "nine hundred twenty million, five hundred nine thousand, seven hundred thirteen".