354540409 has 2 divisors, whose sum is σ = 354540410. Its totient is φ = 354540408.

The previous prime is 354540379. The next prime is 354540427. The reversal of 354540409 is 904045453.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 308775184 + 45765225 = 17572^2 + 6765^2 .

It is a cyclic number.

It is not a de Polignac number, because 354540409 - 2⁹ = 354539897 is a prime.

It is a super-2 number, since 2×354540409² = 251397803227774562, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (354540449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 177270204 + 177270205.

It is an arithmetic number, because the mean of its divisors is an integer number (177270205).

Almost surely, 2^354540409 is an apocalyptic number.

It is an amenable number.

354540409 is a deficient number, since it is larger than the sum of its proper divisors (1).

354540409 is an equidigital number, since it uses as much as digits as its factorization.

354540409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43200, while the sum is 34.

The square root of 354540409 is about 18829.2434526722. The cubic root of 354540409 is about 707.7641820792.

The spelling of 354540409 in words is "three hundred fifty-four million, five hundred forty thousand, four hundred nine".