1621060043 has 2 divisors, whose sum is σ = 1621060044. Its totient is φ = 1621060042.

The previous prime is 1621060037. The next prime is 1621060081. The reversal of 1621060043 is 3400601261.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (3400601261) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1621060043 - 2¹⁰ = 1621059019 is a prime.

It is a super-2 number, since 2×1621060043² = 5255671326022323698, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1621060843) 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 as a sum of consecutive naturals, namely, 810530021 + 810530022.

It is an arithmetic number, because the mean of its divisors is an integer number (810530022).

Almost surely, 2^1621060043 is an apocalyptic number.

1621060043 is a deficient number, since it is larger than the sum of its proper divisors (1).

1621060043 is an equidigital number, since it uses as much as digits as its factorization.

1621060043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 1621060043 is about 40262.3899315478. The cubic root of 1621060043 is about 1174.7164048940.

The spelling of 1621060043 in words is "one billion, six hundred twenty-one million, sixty thousand, forty-three".