920665 has 4 divisors (see below), whose sum is σ = 1104804. Its totient is φ = 736528.

The previous prime is 920653. The next prime is 920677. The reversal of 920665 is 566029.

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

It is an interprime number because it is at equal distance from previous prime (920653) and next prime (920677).

It can be written as a sum of positive squares in 2 ways, for example, as 546121 + 374544 = 739^2 + 612^2 .

It is a cyclic number.

It is not a de Polignac number, because 920665 - 2¹⁹ = 396377 is a prime.

It is a super-3 number, since 3×920665³ = 2341133366505238875, which contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92062 + ... + 92071.

It is an arithmetic number, because the mean of its divisors is an integer number (276201).

2⁹²⁰⁶⁶⁵ is an apocalyptic number.

It is an amenable number.

920665 is a deficient number, since it is larger than the sum of its proper divisors (184139).

920665 is a wasteful number, since it uses less digits than its factorization.

920665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184138.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 920665 is about 959.5128972557. The cubic root of 920665 is about 97.2823107305.

The spelling of 920665 in words is "nine hundred twenty thousand, six hundred sixty-five".