2125499639 has 4 divisors (see below), whose sum is σ = 2198792760. Its totient is φ = 2052206520.

The previous prime is 2125499633. The next prime is 2125499641. The reversal of 2125499639 is 9369945212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2125499639 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2125499633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36646517 + ... + 36646574.

It is an arithmetic number, because the mean of its divisors is an integer number (549698190).

Almost surely, 2^2125499639 is an apocalyptic number.

2125499639 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

2125499639 is a deficient number, since it is larger than the sum of its proper divisors (73293121).

2125499639 is an equidigital number, since it uses as much as digits as its factorization.

2125499639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73293120.

The product of its digits is 1049760, while the sum is 50.

The square root of 2125499639 is about 46103.1413137977. The cubic root of 2125499639 is about 1285.7415492026.

The spelling of 2125499639 in words is "two billion, one hundred twenty-five million, four hundred ninety-nine thousand, six hundred thirty-nine".