354311509 has 2 divisors, whose sum is σ = 354311510. Its totient is φ = 354311508.

The previous prime is 354311497. The next prime is 354311591. The reversal of 354311509 is 905113453.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 316057284 + 38254225 = 17778^2 + 6185^2 .

It is a cyclic number.

It is not a de Polignac number, because 354311509 - 2²⁵ = 320757077 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 (354312509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 177155754 + 177155755.

It is an arithmetic number, because the mean of its divisors is an integer number (177155755).

Almost surely, 2^354311509 is an apocalyptic number.

It is an amenable number.

354311509 is a deficient number, since it is larger than the sum of its proper divisors (1).

354311509 is an equidigital number, since it uses as much as digits as its factorization.

354311509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8100, while the sum is 31.

The square root of 354311509 is about 18823.1641601512. The cubic root of 354311509 is about 707.6118326385.

The spelling of 354311509 in words is "three hundred fifty-four million, three hundred eleven thousand, five hundred nine".