349191950197 has 4 divisors (see below), whose sum is σ = 349194477196. Its totient is φ = 349189423200.

The previous prime is 349191950179. The next prime is 349191950221. The reversal of 349191950197 is 791059191943.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 791059191943 = 53 ⋅14925645131.

It can be written as a sum of positive squares in 2 ways, for example, as 211870566436 + 137321383761 = 460294^2 + 370569^2 .

It is a cyclic number.

It is not a de Polignac number, because 349191950197 - 2²³ = 349183561589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (349191953197) 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, 1043448 + ... + 1336849.

It is an arithmetic number, because the mean of its divisors is an integer number (87298619299).

Almost surely, 2^349191950197 is an apocalyptic number.

It is an amenable number.

349191950197 is a deficient number, since it is larger than the sum of its proper divisors (2526999).

349191950197 is a wasteful number, since it uses less digits than its factorization.

349191950197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2526998.

The product of its (nonzero) digits is 2755620, while the sum is 58.

The spelling of 349191950197 in words is "three hundred forty-nine billion, one hundred ninety-one million, nine hundred fifty thousand, one hundred ninety-seven".