436809103421 has 2 divisors, whose sum is σ = 436809103422. Its totient is φ = 436809103420.

The previous prime is 436809103361. The next prime is 436809103457. The reversal of 436809103421 is 124301908634.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 244816154521 + 191992948900 = 494789^2 + 438170^2 .

It is a cyclic number.

It is not a de Polignac number, because 436809103421 - 2¹⁸ = 436808841277 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (436809109421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 218404551710 + 218404551711.

It is an arithmetic number, because the mean of its divisors is an integer number (218404551711).

Almost surely, 2^436809103421 is an apocalyptic number.

It is an amenable number.

436809103421 is a deficient number, since it is larger than the sum of its proper divisors (1).

436809103421 is an equidigital number, since it uses as much as digits as its factorization.

436809103421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 124416, while the sum is 41.

The spelling of 436809103421 in words is "four hundred thirty-six billion, eight hundred nine million, one hundred three thousand, four hundred twenty-one".