1191938937 has 16 divisors (see below), whose sum is σ = 1820636160. Its totient is φ = 679477392.

The previous prime is 1191938927. The next prime is 1191938971. The reversal of 1191938937 is 7398391911.

1191938937 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1191938937 - 2⁶ = 1191938873 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1191938937.

It is not an unprimeable number, because it can be changed into a prime (1191938927) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58933 + ... + 76530.

It is an arithmetic number, because the mean of its divisors is an integer number (113789760).

Almost surely, 2^1191938937 is an apocalyptic number.

It is an amenable number.

1191938937 is a deficient number, since it is larger than the sum of its proper divisors (628697223).

1191938937 is a wasteful number, since it uses less digits than its factorization.

1191938937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135892.

The product of its digits is 367416, while the sum is 51.

The square root of 1191938937 is about 34524.4686707848. The cubic root of 1191938937 is about 1060.2737328537.

The spelling of 1191938937 in words is "one billion, one hundred ninety-one million, nine hundred thirty-eight thousand, nine hundred thirty-seven".