1138902911 has 4 divisors (see below), whose sum is σ = 1140631800. Its totient is φ = 1137174024.

The previous prime is 1138902889. The next prime is 1138902923. The reversal of 1138902911 is 1192098311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1192098311 = 919 ⋅1297169.

It is a cyclic number.

It is not a de Polignac number, because 1138902911 - 2¹⁰ = 1138901887 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 (1138902991) 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, 863456 + ... + 864773.

It is an arithmetic number, because the mean of its divisors is an integer number (285157950).

Almost surely, 2^1138902911 is an apocalyptic number.

1138902911 is a deficient number, since it is larger than the sum of its proper divisors (1728889).

1138902911 is an equidigital number, since it uses as much as digits as its factorization.

1138902911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1728888.

The product of its (nonzero) digits is 3888, while the sum is 35.

The square root of 1138902911 is about 33747.6356357005. The cubic root of 1138902911 is about 1044.3087118514.

The spelling of 1138902911 in words is "one billion, one hundred thirty-eight million, nine hundred two thousand, nine hundred eleven".