803554407421 has 2 divisors, whose sum is σ = 803554407422. Its totient is φ = 803554407420.

The previous prime is 803554407367. The next prime is 803554407521. The reversal of 803554407421 is 124704455308.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 776185668196 + 27368739225 = 881014^2 + 165435^2 .

It is a cyclic number.

It is not a de Polignac number, because 803554407421 - 2²⁵ = 803520852989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (803554407521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 401777203710 + 401777203711.

It is an arithmetic number, because the mean of its divisors is an integer number (401777203711).

Almost surely, 2^803554407421 is an apocalyptic number.

It is an amenable number.

803554407421 is a deficient number, since it is larger than the sum of its proper divisors (1).

803554407421 is an equidigital number, since it uses as much as digits as its factorization.

803554407421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 537600, while the sum is 43.

The spelling of 803554407421 in words is "eight hundred three billion, five hundred fifty-four million, four hundred seven thousand, four hundred twenty-one".