354249421 has 2 divisors, whose sum is σ = 354249422. Its totient is φ = 354249420.

The previous prime is 354249409. The next prime is 354249487. The reversal of 354249421 is 124942453.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 322202500 + 32046921 = 17950^2 + 5661^2 .

It is an emirp because it is prime and its reverse (124942453) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 354249421 - 2¹⁹ = 353725133 is a prime.

It is a super-3 number, since 3×354249421³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (354249221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 177124710 + 177124711.

It is an arithmetic number, because the mean of its divisors is an integer number (177124711).

Almost surely, 2^354249421 is an apocalyptic number.

It is an amenable number.

354249421 is a deficient number, since it is larger than the sum of its proper divisors (1).

354249421 is an equidigital number, since it uses as much as digits as its factorization.

354249421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 34.

The square root of 354249421 is about 18821.5148433913. The cubic root of 354249421 is about 707.5704972892.

The spelling of 354249421 in words is "three hundred fifty-four million, two hundred forty-nine thousand, four hundred twenty-one".