920851369 has 4 divisors (see below), whose sum is σ = 920920660. Its totient is φ = 920782080.

The previous prime is 920851367. The next prime is 920851381. The reversal of 920851369 is 963158029.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 223891369 + 696960000 = 14963^2 + 26400^2 .

It is a cyclic number.

It is not a de Polignac number, because 920851369 - 2¹ = 920851367 is a prime.

It is a super-2 number, since 2×920851369² = 1695934487578348322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (920851363) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7752 + ... + 43609.

It is an arithmetic number, because the mean of its divisors is an integer number (230230165).

Almost surely, 2^920851369 is an apocalyptic number.

It is an amenable number.

920851369 is a deficient number, since it is larger than the sum of its proper divisors (69291).

920851369 is a wasteful number, since it uses less digits than its factorization.

920851369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69290.

The product of its (nonzero) digits is 116640, while the sum is 43.

The square root of 920851369 is about 30345.5329332012. The cubic root of 920851369 is about 972.8887453084. Note that the first 3 decimals are identical.

The spelling of 920851369 in words is "nine hundred twenty million, eight hundred fifty-one thousand, three hundred sixty-nine".