2499900001 has 3 divisors (see below), whose sum is σ = 2499950001. Its totient is φ = 2499850002.

The previous prime is 2499899999. The next prime is 2499900023. The reversal of 2499900001 is 1000099942.

The square root of 2499900001 is 49999.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 2499900001 - 2¹ = 2499899999 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2499900001.

It is not an unprimeable number, because it can be changed into a prime (2499900041) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 25000 + ... + 74998.

It is an arithmetic number, because the mean of its divisors is an integer number (833316667).

Almost surely, 2^2499900001 is an apocalyptic number.

2499900001 is the 49999-th square number.

2499900001 is the 25000-th centered octagonal number.

It is an amenable number.

2499900001 is a deficient number, since it is larger than the sum of its proper divisors (50000).

2499900001 is an frugal number, since it uses more digits than its factorization.

2499900001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99998 (or 49999 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 34.

The cubic root of 2499900001 is about 1357.1907121197.

Adding to 2499900001 its reverse (1000099942), we get a palindrome (3499999943).

It can be divided in two parts, 2499 and 900001, that added together give a square (902500 = 950²).

The spelling of 2499900001 in words is "two billion, four hundred ninety-nine million, nine hundred thousand, one".