354609869 has 2 divisors, whose sum is σ = 354609870. Its totient is φ = 354609868.

The previous prime is 354609847. The next prime is 354609967. The reversal of 354609869 is 968906453.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 235254244 + 119355625 = 15338^2 + 10925^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-354609869 is a prime.

It is a super-2 number, since 2×354609869² = 251496318384394322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (354609169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 177304934 + 177304935.

It is an arithmetic number, because the mean of its divisors is an integer number (177304935).

Almost surely, 2^354609869 is an apocalyptic number.

It is an amenable number.

354609869 is a deficient number, since it is larger than the sum of its proper divisors (1).

354609869 is an equidigital number, since it uses as much as digits as its factorization.

354609869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1399680, while the sum is 50.

The square root of 354609869 is about 18831.0878336861. The cubic root of 354609869 is about 707.8103997446.

The spelling of 354609869 in words is "three hundred fifty-four million, six hundred nine thousand, eight hundred sixty-nine".