920280993 has 8 divisors (see below), whose sum is σ = 1239190656. Its totient is φ = 607446000.

The previous prime is 920280967. The next prime is 920281003. The reversal of 920280993 is 399082029.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 920280993 - 2⁵ = 920280961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (920280943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1518313 + ... + 1518918.

It is an arithmetic number, because the mean of its divisors is an integer number (154898832).

Almost surely, 2^920280993 is an apocalyptic number.

It is an amenable number.

920280993 is a deficient number, since it is larger than the sum of its proper divisors (318909663).

920280993 is a wasteful number, since it uses less digits than its factorization.

920280993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3037335.

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 920280993 is about 30336.1334550071. The cubic root of 920280993 is about 972.6878344918.

The spelling of 920280993 in words is "nine hundred twenty million, two hundred eighty thousand, nine hundred ninety-three".