353716421 has 2 divisors, whose sum is σ = 353716422. Its totient is φ = 353716420.

The previous prime is 353716397. The next prime is 353716453. The reversal of 353716421 is 124617353.

It is an a-pointer prime, because the next prime (353716453) can be obtained adding 353716421 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 289476196 + 64240225 = 17014^2 + 8015^2 .

It is a cyclic number.

It is not a de Polignac number, because 353716421 - 2²⁶ = 286607557 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (353716481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 176858210 + 176858211.

It is an arithmetic number, because the mean of its divisors is an integer number (176858211).

Almost surely, 2^353716421 is an apocalyptic number.

It is an amenable number.

353716421 is a deficient number, since it is larger than the sum of its proper divisors (1).

353716421 is an equidigital number, since it uses as much as digits as its factorization.

353716421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15120, while the sum is 32.

The square root of 353716421 is about 18807.3501854993. The cubic root of 353716421 is about 707.2154514228.

The spelling of 353716421 in words is "three hundred fifty-three million, seven hundred sixteen thousand, four hundred twenty-one".