90271001 has 4 divisors (see below), whose sum is σ = 90472500. Its totient is φ = 90069504.

The previous prime is 90270991. The next prime is 90271007. The reversal of 90271001 is 10017209.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 53304601 + 36966400 = 7301^2 + 6080^2 .

It is a cyclic number.

It is not a de Polignac number, because 90271001 - 2⁶ = 90270937 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (90271007) 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, 100076 + ... + 100973.

It is an arithmetic number, because the mean of its divisors is an integer number (22618125).

Almost surely, 2^90271001 is an apocalyptic number.

It is an amenable number.

90271001 is a deficient number, since it is larger than the sum of its proper divisors (201499).

90271001 is a wasteful number, since it uses less digits than its factorization.

90271001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201498.

The product of its (nonzero) digits is 126, while the sum is 20.

The square root of 90271001 is about 9501.1052514957. The cubic root of 90271001 is about 448.5898258539.

The spelling of 90271001 in words is "ninety million, two hundred seventy-one thousand, one".