547434961921 has 2 divisors, whose sum is σ = 547434961922. Its totient is φ = 547434961920.

The previous prime is 547434961859. The next prime is 547434961939. The reversal of 547434961921 is 129169434745.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 536175417600 + 11259544321 = 732240^2 + 106111^2 .

It is a cyclic number.

It is not a de Polignac number, because 547434961921 - 2²³ = 547426573313 is a prime.

It is not a weakly prime, because it can be changed into another prime (547434961321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 273717480960 + 273717480961.

It is an arithmetic number, because the mean of its divisors is an integer number (273717480961).

Almost surely, 2^547434961921 is an apocalyptic number.

It is an amenable number.

547434961921 is a deficient number, since it is larger than the sum of its proper divisors (1).

547434961921 is an equidigital number, since it uses as much as digits as its factorization.

547434961921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6531840, while the sum is 55.

The spelling of 547434961921 in words is "five hundred forty-seven billion, four hundred thirty-four million, nine hundred sixty-one thousand, nine hundred twenty-one".