421854147049 has 2 divisors, whose sum is σ = 421854147050. Its totient is φ = 421854147048.

The previous prime is 421854146983. The next prime is 421854147061. The reversal of 421854147049 is 940741458124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 416618611600 + 5235535449 = 645460^2 + 72357^2 .

It is a cyclic number.

It is not a de Polignac number, because 421854147049 - 2⁹ = 421854146537 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 421854146993 and 421854147011.

It is not a weakly prime, because it can be changed into another prime (421854147149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210927073524 + 210927073525.

It is an arithmetic number, because the mean of its divisors is an integer number (210927073525).

Almost surely, 2^421854147049 is an apocalyptic number.

It is an amenable number.

421854147049 is a deficient number, since it is larger than the sum of its proper divisors (1).

421854147049 is an equidigital number, since it uses as much as digits as its factorization.

421854147049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1290240, while the sum is 49.

The spelling of 421854147049 in words is "four hundred twenty-one billion, eight hundred fifty-four million, one hundred forty-seven thousand, forty-nine".