1872373821 has 8 divisors (see below), whose sum is σ = 2496699744. Its totient is φ = 1248148560.

The previous prime is 1872373817. The next prime is 1872373823. The reversal of 1872373821 is 1283732781.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1872373821 - 2² = 1872373817 is a prime.

It is a super-2 number, since 2×1872373821² = 7011567451132280082, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1872373823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52351 + ... + 80531.

It is an arithmetic number, because the mean of its divisors is an integer number (312087468).

Almost surely, 2^1872373821 is an apocalyptic number.

It is an amenable number.

1872373821 is a deficient number, since it is larger than the sum of its proper divisors (624325923).

1872373821 is a wasteful number, since it uses less digits than its factorization.

1872373821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50331.

The product of its digits is 112896, while the sum is 42.

The square root of 1872373821 is about 43270.9350603844. The cubic root of 1872373821 is about 1232.5300602285.

The spelling of 1872373821 in words is "one billion, eight hundred seventy-two million, three hundred seventy-three thousand, eight hundred twenty-one".