354343921 has 2 divisors, whose sum is σ = 354343922. Its totient is φ = 354343920.

The previous prime is 354343909. The next prime is 354343933. The reversal of 354343921 is 129343453.

It is a balanced prime because it is at equal distance from previous prime (354343909) and next prime (354343933).

It can be written as a sum of positive squares in only one way, i.e., 178516321 + 175827600 = 13361^2 + 13260^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-354343921 is a prime.

It is a super-2 number, since 2×354343921² = 251119228699308482, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (354343991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 177171960 + 177171961.

It is an arithmetic number, because the mean of its divisors is an integer number (177171961).

Almost surely, 2^354343921 is an apocalyptic number.

It is an amenable number.

354343921 is a deficient number, since it is larger than the sum of its proper divisors (1).

354343921 is an equidigital number, since it uses as much as digits as its factorization.

354343921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 34.

The square root of 354343921 is about 18824.0251009182. The cubic root of 354343921 is about 707.6334091466.

The spelling of 354343921 in words is "three hundred fifty-four million, three hundred forty-three thousand, nine hundred twenty-one".