354491971243 has 4 divisors (see below), whose sum is σ = 354532777720. Its totient is φ = 354451164768.

The previous prime is 354491971231. The next prime is 354491971259. The reversal of 354491971243 is 342179194453.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 354491971243 - 2¹³ = 354491963051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (354491971213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20390205 + ... + 20407582.

It is an arithmetic number, because the mean of its divisors is an integer number (88633194430).

Almost surely, 2^354491971243 is an apocalyptic number.

354491971243 is a deficient number, since it is larger than the sum of its proper divisors (40806477).

354491971243 is an equidigital number, since it uses as much as digits as its factorization.

354491971243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40806476.

The product of its digits is 3265920, while the sum is 52.

The spelling of 354491971243 in words is "three hundred fifty-four billion, four hundred ninety-one million, nine hundred seventy-one thousand, two hundred forty-three".