1872522649 has 4 divisors (see below), whose sum is σ = 1882868260. Its totient is φ = 1862177040.

The previous prime is 1872522643. The next prime is 1872522653. The reversal of 1872522649 is 9462252781.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9462252781 = 601 ⋅15744181.

It can be written as a sum of positive squares in 2 ways, for example, as 363588624 + 1508934025 = 19068^2 + 38845^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1872522649 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1872522599 and 1872522608.

It is not an unprimeable number, because it can be changed into a prime (1872522643) 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, 5172534 + ... + 5172895.

It is an arithmetic number, because the mean of its divisors is an integer number (470717065).

Almost surely, 2^1872522649 is an apocalyptic number.

It is an amenable number.

1872522649 is a deficient number, since it is larger than the sum of its proper divisors (10345611).

1872522649 is a wasteful number, since it uses less digits than its factorization.

1872522649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10345610.

The product of its digits is 483840, while the sum is 46.

The square root of 1872522649 is about 43272.6547486978. The cubic root of 1872522649 is about 1232.5627157666.

The spelling of 1872522649 in words is "one billion, eight hundred seventy-two million, five hundred twenty-two thousand, six hundred forty-nine".