1872220057 has 2 divisors, whose sum is σ = 1872220058. Its totient is φ = 1872220056.

The previous prime is 1872220027. The next prime is 1872220073. The reversal of 1872220057 is 7500222781.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1326343561 + 545876496 = 36419^2 + 23364^2 .

It is a cyclic number.

It is not a de Polignac number, because 1872220057 - 2¹⁹ = 1871695769 is a prime.

It is not a weakly prime, because it can be changed into another prime (1872220027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 936110028 + 936110029.

It is an arithmetic number, because the mean of its divisors is an integer number (936110029).

Almost surely, 2^1872220057 is an apocalyptic number.

It is an amenable number.

1872220057 is a deficient number, since it is larger than the sum of its proper divisors (1).

1872220057 is an equidigital number, since it uses as much as digits as its factorization.

1872220057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15680, while the sum is 34.

The square root of 1872220057 is about 43269.1582654435. The cubic root of 1872220057 is about 1232.4963198258.

The spelling of 1872220057 in words is "one billion, eight hundred seventy-two million, two hundred twenty thousand, fifty-seven".