899940001 has 9 divisors (see below), whose sum is σ = 910839603. Its totient is φ = 889170360.

The previous prime is 899939987. The next prime is 899940043. The reversal of 899940001 is 100049998.

The square root of 899940001 is 29999.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 838160401 + 61779600 = 28951^2 + 7860^2 .

It is not a de Polignac number, because 899940001 - 2⁵ = 899939969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (899940091) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3929755 + ... + 3929983.

Almost surely, 2^899940001 is an apocalyptic number.

899940001 is the 29999-th square number.

899940001 is the 15000-th centered octagonal number.

It is an amenable number.

899940001 is a deficient number, since it is larger than the sum of its proper divisors (10899602).

899940001 is an frugal number, since it uses more digits than its factorization.

899940001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 720 (or 360 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 40.

The cubic root of 899940001 is about 965.4679291668.

Adding to 899940001 its reverse (100049998), we get a palindrome (999989999).

It can be divided in two parts, 899 and 940001, that added together give a square (940900 = 970²).

The spelling of 899940001 in words is "eight hundred ninety-nine million, nine hundred forty thousand, one".