1977133423 has 4 divisors (see below), whose sum is σ = 1977556240. Its totient is φ = 1976710608.

The previous prime is 1977133397. The next prime is 1977133427. The reversal of 1977133423 is 3243317791.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1977133423 - 2⁵ = 1977133391 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 (1977133427) 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 3 ways as a sum of consecutive naturals, for example, 204315 + ... + 213772.

It is an arithmetic number, because the mean of its divisors is an integer number (494389060).

Almost surely, 2^1977133423 is an apocalyptic number.

1977133423 is a deficient number, since it is larger than the sum of its proper divisors (422817).

1977133423 is an equidigital number, since it uses as much as digits as its factorization.

1977133423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422816.

The product of its digits is 95256, while the sum is 40.

The square root of 1977133423 is about 44464.9684920613. The cubic root of 1977133423 is about 1255.1009528162.

The spelling of 1977133423 in words is "one billion, nine hundred seventy-seven million, one hundred thirty-three thousand, four hundred twenty-three".