1055621843 has 2 divisors, whose sum is σ = 1055621844. Its totient is φ = 1055621842.

The previous prime is 1055621821. The next prime is 1055621849. The reversal of 1055621843 is 3481265501.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1055621843 - 2¹² = 1055617747 is a prime.

It is a super-2 number, since 2×1055621843² = 2228674950837433298, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1055621849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 527810921 + 527810922.

It is an arithmetic number, because the mean of its divisors is an integer number (527810922).

Almost surely, 2^1055621843 is an apocalyptic number.

1055621843 is a deficient number, since it is larger than the sum of its proper divisors (1).

1055621843 is an equidigital number, since it uses as much as digits as its factorization.

1055621843 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 1055621843 is about 32490.3346089264. The cubic root of 1055621843 is about 1018.2071038269.

The spelling of 1055621843 in words is "one billion, fifty-five million, six hundred twenty-one thousand, eight hundred forty-three".