1892723149 has 4 divisors (see below), whose sum is σ = 1892871036. Its totient is φ = 1892575264.

The previous prime is 1892723099. The next prime is 1892723167. The reversal of 1892723149 is 9413272981.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9413272981 = 7 ⋅1344753283.

It can be written as a sum of positive squares in 2 ways, for example, as 822255625 + 1070467524 = 28675^2 + 32718^2 .

It is a cyclic number.

It is not a de Polignac number, because 1892723149 - 2¹¹ = 1892721101 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1892723099 and 1892723108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1892723179) 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, 52714 + ... + 81019.

It is an arithmetic number, because the mean of its divisors is an integer number (473217759).

Almost surely, 2^1892723149 is an apocalyptic number.

It is an amenable number.

1892723149 is a deficient number, since it is larger than the sum of its proper divisors (147887).

1892723149 is a wasteful number, since it uses less digits than its factorization.

1892723149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147886.

The product of its digits is 217728, while the sum is 46.

The square root of 1892723149 is about 43505.4381543273. The cubic root of 1892723149 is about 1236.9791078372.

The spelling of 1892723149 in words is "one billion, eight hundred ninety-two million, seven hundred twenty-three thousand, one hundred forty-nine".