993415421 has 2 divisors, whose sum is σ = 993415422. Its totient is φ = 993415420.

The previous prime is 993415403. The next prime is 993415469. The reversal of 993415421 is 124514399.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 828806521 + 164608900 = 28789^2 + 12830^2 .

It is a cyclic number.

It is not a de Polignac number, because 993415421 - 2¹⁴ = 993399037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (993415021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 496707710 + 496707711.

It is an arithmetic number, because the mean of its divisors is an integer number (496707711).

Almost surely, 2^993415421 is an apocalyptic number.

It is an amenable number.

993415421 is a deficient number, since it is larger than the sum of its proper divisors (1).

993415421 is an equidigital number, since it uses as much as digits as its factorization.

993415421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 38.

The square root of 993415421 is about 31518.4933174160. The cubic root of 993415421 is about 997.8003052241.

The spelling of 993415421 in words is "nine hundred ninety-three million, four hundred fifteen thousand, four hundred twenty-one".