354691609 has 2 divisors, whose sum is σ = 354691610. Its totient is φ = 354691608.

The previous prime is 354691523. The next prime is 354691627. The reversal of 354691609 is 906196453.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 354493584 + 198025 = 18828^2 + 445^2 .

It is a cyclic number.

It is not a de Polignac number, because 354691609 - 2¹⁵ = 354658841 is a prime.

It is a super-2 number, since 2×354691609² = 251612274990017762, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (354691409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 177345804 + 177345805.

It is an arithmetic number, because the mean of its divisors is an integer number (177345805).

Almost surely, 2^354691609 is an apocalyptic number.

It is an amenable number.

354691609 is a deficient number, since it is larger than the sum of its proper divisors (1).

354691609 is an equidigital number, since it uses as much as digits as its factorization.

354691609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 174960, while the sum is 43.

The square root of 354691609 is about 18833.2580558968. The cubic root of 354691609 is about 707.8647806124.

The spelling of 354691609 in words is "three hundred fifty-four million, six hundred ninety-one thousand, six hundred nine".