901000090 has 8 divisors (see below), whose sum is σ = 1621800180. Its totient is φ = 360400032.

The previous prime is 901000069. The next prime is 901000097. The reversal of 901000090 is 90000109.

It can be written as a sum of positive squares in 2 ways, for example, as 889649929 + 11350161 = 29827^2 + 3369^2 .

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

It is not an unprimeable number, because it can be changed into a prime (901000097) 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, 45049995 + ... + 45050014.

Almost surely, 2^901000090 is an apocalyptic number.

901000090 is a deficient number, since it is larger than the sum of its proper divisors (720800090).

901000090 is a wasteful number, since it uses less digits than its factorization.

901000090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90100016.

The product of its (nonzero) digits is 81, while the sum is 19.

The square root of 901000090 is about 30016.6635387746. The cubic root of 901000090 is about 965.8468730672.

Adding to 901000090 its sum of digits (19), we get a palindrome (901000109).

Adding to 901000090 its reverse (90000109), we get a palindrome (991000199).

The spelling of 901000090 in words is "nine hundred one million, ninety", and thus it is an aban number.