901000091 has 16 divisors (see below), whose sum is σ = 960254784. Its totient is φ = 843600384.

The previous prime is 901000069. The next prime is 901000097. The reversal of 901000091 is 190000109.

It is a cyclic number.

It is not a de Polignac number, because 901000091 - 2¹⁸ = 900737947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (901000097) 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 15 ways as a sum of consecutive naturals, for example, 228065 + ... + 231981.

It is an arithmetic number, because the mean of its divisors is an integer number (60015924).

Almost surely, 2^901000091 is an apocalyptic number.

901000091 is a deficient number, since it is larger than the sum of its proper divisors (59254693).

901000091 is a wasteful number, since it uses less digits than its factorization.

901000091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4150.

The product of its (nonzero) digits is 81, while the sum is 20.

The square root of 901000091 is about 30016.6635554320. The cubic root of 901000091 is about 965.8468734245.

The spelling of 901000091 in words is "nine hundred one million, ninety-one", and thus it is an aban number.