920925505 has 4 divisors (see below), whose sum is σ = 1105110612. Its totient is φ = 736740400.

The previous prime is 920925503. The next prime is 920925517. The reversal of 920925505 is 505529029.

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 576192016 + 344733489 = 24004^2 + 18567^2 .

It is not a de Polignac number, because 920925505 - 2¹ = 920925503 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (920925503) 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, 92092546 + ... + 92092555.

It is an arithmetic number, because the mean of its divisors is an integer number (276277653).

Almost surely, 2^920925505 is an apocalyptic number.

It is an amenable number.

920925505 is a deficient number, since it is larger than the sum of its proper divisors (184185107).

920925505 is a wasteful number, since it uses less digits than its factorization.

920925505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184185106.

The product of its (nonzero) digits is 40500, while the sum is 37.

The square root of 920925505 is about 30346.7544393136. The cubic root of 920925505 is about 972.9148530846.

The spelling of 920925505 in words is "nine hundred twenty million, nine hundred twenty-five thousand, five hundred five".