354340981 has 2 divisors, whose sum is σ = 354340982. Its totient is φ = 354340980.

The previous prime is 354340963. The next prime is 354340997. The reversal of 354340981 is 189043453.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 353778481 + 562500 = 18809^2 + 750^2 .

It is a cyclic number.

It is not a de Polignac number, because 354340981 - 2⁵ = 354340949 is a prime.

It is a super-2 number, since 2×354340981² = 251115061632084722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 354340981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (354340681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 177170490 + 177170491.

It is an arithmetic number, because the mean of its divisors is an integer number (177170491).

Almost surely, 2^354340981 is an apocalyptic number.

It is an amenable number.

354340981 is a deficient number, since it is larger than the sum of its proper divisors (1).

354340981 is an equidigital number, since it uses as much as digits as its factorization.

354340981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 354340981 is about 18823.9470090627. The cubic root of 354340981 is about 707.6314520574.

The spelling of 354340981 in words is "three hundred fifty-four million, three hundred forty thousand, nine hundred eighty-one".