1872220047 has 16 divisors (see below), whose sum is σ = 2666532960. Its totient is φ = 1164326912.

The previous prime is 1872220027. The next prime is 1872220057. The reversal of 1872220047 is 7400222781.

It is a cyclic number.

It is not a de Polignac number, because 1872220047 - 2¹² = 1872215951 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1872220027) 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, 156672 + ... + 168197.

It is an arithmetic number, because the mean of its divisors is an integer number (166658310).

Almost surely, 2^1872220047 is an apocalyptic number.

1872220047 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1872220047 is a deficient number, since it is larger than the sum of its proper divisors (794312913).

1872220047 is a wasteful number, since it uses less digits than its factorization.

1872220047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325002.

The product of its (nonzero) digits is 12544, while the sum is 33.

The square root of 1872220047 is about 43269.1581498878. The cubic root of 1872220047 is about 1232.4963176314.

The spelling of 1872220047 in words is "one billion, eight hundred seventy-two million, two hundred twenty thousand, forty-seven".