354240581 has 2 divisors, whose sum is σ = 354240582. Its totient is φ = 354240580.

The previous prime is 354240569. The next prime is 354240589. The reversal of 354240581 is 185042453.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 336135556 + 18105025 = 18334^2 + 4255^2 .

It is an emirp because it is prime and its reverse (185042453) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-354240581 is a prime.

It is a super-3 number, since 3×354240581³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (354240589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 177120290 + 177120291.

It is an arithmetic number, because the mean of its divisors is an integer number (177120291).

Almost surely, 2^354240581 is an apocalyptic number.

It is an amenable number.

354240581 is a deficient number, since it is larger than the sum of its proper divisors (1).

354240581 is an equidigital number, since it uses as much as digits as its factorization.

354240581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19200, while the sum is 32.

The square root of 354240581 is about 18821.2800042930. The cubic root of 354240581 is about 707.5646116289.

The spelling of 354240581 in words is "three hundred fifty-four million, two hundred forty thousand, five hundred eighty-one".