421440361193 has 2 divisors, whose sum is σ = 421440361194. Its totient is φ = 421440361192.

The previous prime is 421440361189. The next prime is 421440361213. The reversal of 421440361193 is 391163044124.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 370098239449 + 51342121744 = 608357^2 + 226588^2 .

It is a cyclic number.

It is not a de Polignac number, because 421440361193 - 2² = 421440361189 is a prime.

It is a super-2 number, since 2×421440361193² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (421440391193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210720180596 + 210720180597.

It is an arithmetic number, because the mean of its divisors is an integer number (210720180597).

Almost surely, 2^421440361193 is an apocalyptic number.

It is an amenable number.

421440361193 is a deficient number, since it is larger than the sum of its proper divisors (1).

421440361193 is an equidigital number, since it uses as much as digits as its factorization.

421440361193 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 38.

The spelling of 421440361193 in words is "four hundred twenty-one billion, four hundred forty million, three hundred sixty-one thousand, one hundred ninety-three".