354347717021 has 2 divisors, whose sum is σ = 354347717022. Its totient is φ = 354347717020.

The previous prime is 354347716999. The next prime is 354347717033. The reversal of 354347717021 is 120717743453.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 179026303225 + 175321413796 = 423115^2 + 418714^2 .

It is a cyclic number.

It is not a de Polignac number, because 354347717021 - 2²² = 354343522717 is a prime.

It is a super-2 number, since 2×354347717021² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (354347717071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 177173858510 + 177173858511.

It is an arithmetic number, because the mean of its divisors is an integer number (177173858511).

Almost surely, 2^354347717021 is an apocalyptic number.

It is an amenable number.

354347717021 is a deficient number, since it is larger than the sum of its proper divisors (1).

354347717021 is an equidigital number, since it uses as much as digits as its factorization.

354347717021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 493920, while the sum is 44.

The spelling of 354347717021 in words is "three hundred fifty-four billion, three hundred forty-seven million, seven hundred seventeen thousand, twenty-one".