920845261 has 4 divisors (see below), whose sum is σ = 1052394592. Its totient is φ = 789295932.

The previous prime is 920845231. The next prime is 920845313. The reversal of 920845261 is 162548029.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 162548029 = 7 ⋅23221147.

It is a cyclic number.

It is not a de Polignac number, because 920845261 - 2⁵ = 920845229 is a prime.

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 920845261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (920845231) 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, 65774655 + ... + 65774668.

It is an arithmetic number, because the mean of its divisors is an integer number (263098648).

Almost surely, 2^920845261 is an apocalyptic number.

It is an amenable number.

920845261 is a deficient number, since it is larger than the sum of its proper divisors (131549331).

920845261 is a wasteful number, since it uses less digits than its factorization.

920845261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131549330.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 920845261 is about 30345.4322921919. The cubic root of 920845261 is about 972.8865942491.

The spelling of 920845261 in words is "nine hundred twenty million, eight hundred forty-five thousand, two hundred sixty-one".