2139849489 has 4 divisors (see below), whose sum is σ = 2853132656. Its totient is φ = 1426566324.

The previous prime is 2139849487. The next prime is 2139849497. The reversal of 2139849489 is 9849489312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2139849489 - 2¹ = 2139849487 is a prime.

It is a super-2 number, since 2×2139849489² = 9157911671147122242, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 6.

It is not an unprimeable number, because it can be changed into a prime (2139849487) 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, 356641579 + ... + 356641584.

It is an arithmetic number, because the mean of its divisors is an integer number (713283164).

Almost surely, 2^2139849489 is an apocalyptic number.

It is an amenable number.

2139849489 is a deficient number, since it is larger than the sum of its proper divisors (713283167).

2139849489 is an equidigital number, since it uses as much as digits as its factorization.

2139849489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713283166.

The product of its digits is 4478976, while the sum is 57.

The square root of 2139849489 is about 46258.5072067831. The cubic root of 2139849489 is about 1288.6285304139.

The spelling of 2139849489 in words is "two billion, one hundred thirty-nine million, eight hundred forty-nine thousand, four hundred eighty-nine".