2139337491 has 8 divisors (see below), whose sum is σ = 2852689344. Its totient is φ = 1426105320.

The previous prime is 2139337481. The next prime is 2139337523. The reversal of 2139337491 is 1947339312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2139337491 - 2¹⁵ = 2139304723 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2139337481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27576 + ... + 70986.

It is an arithmetic number, because the mean of its divisors is an integer number (356586168).

Almost surely, 2^2139337491 is an apocalyptic number.

2139337491 is a deficient number, since it is larger than the sum of its proper divisors (713351853).

2139337491 is a wasteful number, since it uses less digits than its factorization.

2139337491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59841.

The product of its digits is 122472, while the sum is 42.

The square root of 2139337491 is about 46252.9727801360. The cubic root of 2139337491 is about 1288.5257462598.

The spelling of 2139337491 in words is "two billion, one hundred thirty-nine million, three hundred thirty-seven thousand, four hundred ninety-one".