920845069 has 4 divisors (see below), whose sum is σ = 975012444. Its totient is φ = 866677696.

The previous prime is 920845039. The next prime is 920845087. The reversal of 920845069 is 960548029.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 566916100 + 353928969 = 23810^2 + 18813^2 .

It is a cyclic number.

It is not a de Polignac number, because 920845069 - 2²¹ = 918747917 is a prime.

It is a super-2 number, since 2×920845069² = 1695911282203229522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (920845019) 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, 27083662 + ... + 27083695.

It is an arithmetic number, because the mean of its divisors is an integer number (243753111).

Almost surely, 2^920845069 is an apocalyptic number.

It is an amenable number.

920845069 is a deficient number, since it is larger than the sum of its proper divisors (54167375).

920845069 is a wasteful number, since it uses less digits than its factorization.

920845069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54167374.

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 920845069 is about 30345.4291286184. The cubic root of 920845069 is about 972.8865266322.

The spelling of 920845069 in words is "nine hundred twenty million, eight hundred forty-five thousand, sixty-nine".