999998901 has 12 divisors (see below), whose sum is σ = 1575756000. Its totient is φ = 606059880.

The previous prime is 999998869. The next prime is 999998903. The reversal of 999998901 is 109899999.

It is not a de Polignac number, because 999998901 - 2⁵ = 999998869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999998903) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5050401 + ... + 5050598.

It is an arithmetic number, because the mean of its divisors is an integer number (131313000).

Almost surely, 2^999998901 is an apocalyptic number.

It is an amenable number.

999998901 is a deficient number, since it is larger than the sum of its proper divisors (575757099).

999998901 is a wasteful number, since it uses less digits than its factorization.

999998901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10101016 (or 10101013 counting only the distinct ones).

The product of its (nonzero) digits is 4251528, while the sum is 63.

The square root of 999998901 is about 31622.7592249633. The cubic root of 999998901 is about 999.9996336665. Note that the first 3 decimals are identical.

It can be divided in two parts, 99999 and 8901, that added together give a square (108900 = 330²).

The spelling of 999998901 in words is "nine hundred ninety-nine million, nine hundred ninety-eight thousand, nine hundred one".