421612193 has 2 divisors, whose sum is σ = 421612194. Its totient is φ = 421612192.

The previous prime is 421612141. The next prime is 421612211. The reversal of 421612193 is 391216124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 407111329 + 14500864 = 20177^2 + 3808^2 .

It is a cyclic number.

It is not a de Polignac number, because 421612193 - 2⁸ = 421611937 is a prime.

It is a super-3 number, since 3×421612193³ (a number of 27 digits) contains 333 as substring.

It is equal to p_22425707 and since 421612193 and 22425707 have the same sum of digits, it is a Honaker prime.

It is a weakly prime.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210806096 + 210806097.

It is an arithmetic number, because the mean of its divisors is an integer number (210806097).

Almost surely, 2^421612193 is an apocalyptic number.

It is an amenable number.

421612193 is a deficient number, since it is larger than the sum of its proper divisors (1).

421612193 is an equidigital number, since it uses as much as digits as its factorization.

421612193 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 29.

The square root of 421612193 is about 20533.1973399176. The cubic root of 421612193 is about 749.8442301684.

The spelling of 421612193 in words is "four hundred twenty-one million, six hundred twelve thousand, one hundred ninety-three".