2138603091 has 8 divisors (see below), whose sum is σ = 2921019024. Its totient is φ = 1390961280.

The previous prime is 2138603069. The next prime is 2138603099. The reversal of 2138603091 is 1903068312.

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

It is not a de Polignac number, because 2138603091 - 2⁵ = 2138603059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2138603099) 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, 8693386 + ... + 8693631.

It is an arithmetic number, because the mean of its divisors is an integer number (365127378).

Almost surely, 2^2138603091 is an apocalyptic number.

2138603091 is a deficient number, since it is larger than the sum of its proper divisors (782415933).

2138603091 is a wasteful number, since it uses less digits than its factorization.

2138603091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17387061.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 2138603091 is about 46245.0331495178. The cubic root of 2138603091 is about 1288.3782860274.

The spelling of 2138603091 in words is "two billion, one hundred thirty-eight million, six hundred three thousand, ninety-one".