920091001 has 4 divisors (see below), whose sum is σ = 920877904. Its totient is φ = 919304100.

The previous prime is 920090933. The next prime is 920091037. The reversal of 920091001 is 100190029.

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, and also an emirpimes, since its reverse is a distinct semiprime: 100190029 = 8719 ⋅11491.

It is a cyclic number.

It is not a de Polignac number, because 920091001 - 2¹⁵ = 920058233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (920091301) 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, 391695 + ... + 394036.

It is an arithmetic number, because the mean of its divisors is an integer number (230219476).

Almost surely, 2^920091001 is an apocalyptic number.

It is an amenable number.

920091001 is a deficient number, since it is larger than the sum of its proper divisors (786903).

920091001 is a wasteful number, since it uses less digits than its factorization.

920091001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 786902.

The product of its (nonzero) digits is 162, while the sum is 22.

The square root of 920091001 is about 30333.0018461741. The cubic root of 920091001 is about 972.6208927543.

The spelling of 920091001 in words is "nine hundred twenty million, ninety-one thousand, one".