920863609 has 4 divisors (see below), whose sum is σ = 922786560. Its totient is φ = 918940660.

The previous prime is 920863597. The next prime is 920863613. The reversal of 920863609 is 906368029.

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.

It is a cyclic number.

It is not a de Polignac number, because 920863609 - 2²³ = 912475001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (920863109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 960757 + ... + 961714.

It is an arithmetic number, because the mean of its divisors is an integer number (230696640).

Almost surely, 2^920863609 is an apocalyptic number.

It is an amenable number.

920863609 is a deficient number, since it is larger than the sum of its proper divisors (1922951).

920863609 is a wasteful number, since it uses less digits than its factorization.

920863609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1922950.

The product of its (nonzero) digits is 139968, while the sum is 43.

The square root of 920863609 is about 30345.7346096614. The cubic root of 920863609 is about 972.8930558504.

The spelling of 920863609 in words is "nine hundred twenty million, eight hundred sixty-three thousand, six hundred nine".