354242491 has 2 divisors, whose sum is σ = 354242492. Its totient is φ = 354242490.

The previous prime is 354242417. The next prime is 354242503. The reversal of 354242491 is 194242453.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 354242491 - 2¹¹ = 354240443 is a prime.

It is a super-3 number, since 3×354242491³ (a number of 27 digits) contains 333 as substring.

It is equal to p_19019059 and since 354242491 and 19019059 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (354245491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 177121245 + 177121246.

It is an arithmetic number, because the mean of its divisors is an integer number (177121246).

Almost surely, 2^354242491 is an apocalyptic number.

354242491 is a deficient number, since it is larger than the sum of its proper divisors (1).

354242491 is an equidigital number, since it uses as much as digits as its factorization.

354242491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 34.

The square root of 354242491 is about 18821.3307446631. The cubic root of 354242491 is about 707.5658833127.

The spelling of 354242491 in words is "three hundred fifty-four million, two hundred forty-two thousand, four hundred ninety-one".