421186093 has 2 divisors, whose sum is σ = 421186094. Its totient is φ = 421186092.

The previous prime is 421186079. The next prime is 421186127. The reversal of 421186093 is 390681124.

It is an a-pointer prime, because the next prime (421186127) can be obtained adding 421186093 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 323532169 + 97653924 = 17987^2 + 9882^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421186093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421186043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210593046 + 210593047.

It is an arithmetic number, because the mean of its divisors is an integer number (210593047).

Almost surely, 2^421186093 is an apocalyptic number.

It is an amenable number.

421186093 is a deficient number, since it is larger than the sum of its proper divisors (1).

421186093 is an equidigital number, since it uses as much as digits as its factorization.

421186093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 421186093 is about 20522.8188366023. The cubic root of 421186093 is about 749.5915363985.

The spelling of 421186093 in words is "four hundred twenty-one million, one hundred eighty-six thousand, ninety-three".