1000900081 has 8 divisors (see below), whose sum is σ = 1010392064. Its totient is φ = 991433520.

The previous prime is 1000900079. The next prime is 1000900093. The reversal of 1000900081 is 1800090001.

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

It is a cyclic number.

It is not a de Polignac number, because 1000900081 - 2¹ = 1000900079 is a prime.

It is a super-2 number, since 2×1000900081² = 2003601944291613122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1000900051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77986 + ... + 89908.

It is an arithmetic number, because the mean of its divisors is an integer number (126299008).

Almost surely, 2^1000900081 is an apocalyptic number.

It is an amenable number.

1000900081 is a deficient number, since it is larger than the sum of its proper divisors (9491983).

1000900081 is a wasteful number, since it uses less digits than its factorization.

1000900081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12711.

The product of its (nonzero) digits is 72, while the sum is 19.

The square root of 1000900081 is about 31637.0049309349. The cubic root of 1000900081 is about 1000.2999370288.

Adding to 1000900081 its reverse (1800090001), we get a palindrome (2800990082).

The spelling of 1000900081 in words is "one billion, nine hundred thousand, eighty-one".