2489928139 has 4 divisors (see below), whose sum is σ = 2575787760. Its totient is φ = 2404068520.

The previous prime is 2489928121. The next prime is 2489928151. The reversal of 2489928139 is 9318299842.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9318299842 = 2 ⋅4659149921.

It is a cyclic number.

It is not a de Polignac number, because 2489928139 - 2⁵ = 2489928107 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 2489928139.

It is not an unprimeable number, because it can be changed into a prime (2489928109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42929767 + ... + 42929824.

It is an arithmetic number, because the mean of its divisors is an integer number (643946940).

Almost surely, 2^2489928139 is an apocalyptic number.

2489928139 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

2489928139 is a deficient number, since it is larger than the sum of its proper divisors (85859621).

2489928139 is an equidigital number, since it uses as much as digits as its factorization.

2489928139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85859620.

The product of its digits is 2239488, while the sum is 55.

The square root of 2489928139 is about 49899.1797427573. The cubic root of 2489928139 is about 1355.3837393914.

The spelling of 2489928139 in words is "two billion, four hundred eighty-nine million, nine hundred twenty-eight thousand, one hundred thirty-nine".