920000001 has 4 divisors (see below), whose sum is σ = 1226666672. Its totient is φ = 613333332.

The previous prime is 919999991. The next prime is 920000021. The reversal of 920000001 is 100000029.

It is a happy number.

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 not a de Polignac number, because 920000001 - 2⁶ = 919999937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (920000021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153333331 + ... + 153333336.

It is an arithmetic number, because the mean of its divisors is an integer number (306666668).

Almost surely, 2^920000001 is an apocalyptic number.

It is an amenable number.

920000001 is a deficient number, since it is larger than the sum of its proper divisors (306666671).

920000001 is a wasteful number, since it uses less digits than its factorization.

920000001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306666670.

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 920000001 is about 30331.5017926907. The cubic root of 920000001 is about 972.5888265712.

The spelling of 920000001 in words is "nine hundred twenty million, one", and thus it is an aban number.