2138964693 has 8 divisors (see below), whose sum is σ = 2853821856. Its totient is φ = 1425042000.

The previous prime is 2138964637. The next prime is 2138964719. The reversal of 2138964693 is 3964698312.

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

It is not a de Polignac number, because 2138964693 - 2¹⁰ = 2138963669 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2138964613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 228258 + ... + 237443.

It is an arithmetic number, because the mean of its divisors is an integer number (356727732).

Almost surely, 2^2138964693 is an apocalyptic number.

It is an amenable number.

2138964693 is a deficient number, since it is larger than the sum of its proper divisors (714857163).

2138964693 is a wasteful number, since it uses less digits than its factorization.

2138964693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467235.

The product of its digits is 1679616, while the sum is 51.

The square root of 2138964693 is about 46248.9426149399. The cubic root of 2138964693 is about 1288.4508963389.

The spelling of 2138964693 in words is "two billion, one hundred thirty-eight million, nine hundred sixty-four thousand, six hundred ninety-three".