2139510493 has 4 divisors (see below), whose sum is σ = 2144741980. Its totient is φ = 2134279008.

The previous prime is 2139510487. The next prime is 2139510511. The reversal of 2139510493 is 3940159312.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1662437529 + 477072964 = 40773^2 + 21842^2 .

It is a cyclic number.

It is not a de Polignac number, because 2139510493 - 2¹⁷ = 2139379421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2139510463) 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, 2615130 + ... + 2615947.

It is an arithmetic number, because the mean of its divisors is an integer number (536185495).

Almost surely, 2^2139510493 is an apocalyptic number.

It is an amenable number.

2139510493 is a deficient number, since it is larger than the sum of its proper divisors (5231487).

2139510493 is an equidigital number, since it uses as much as digits as its factorization.

2139510493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5231486.

The product of its (nonzero) digits is 29160, while the sum is 37.

The square root of 2139510493 is about 46254.8429140128. The cubic root of 2139510493 is about 1288.5604784333.

The spelling of 2139510493 in words is "two billion, one hundred thirty-nine million, five hundred ten thousand, four hundred ninety-three".