1349970191 has 4 divisors (see below), whose sum is σ = 1352334984. Its totient is φ = 1347605400.

The previous prime is 1349970173. The next prime is 1349970227. The reversal of 1349970191 is 1910799431.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1910799431 = 443 ⋅4313317.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1349970191 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 (1349970151) 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, 1181540 + ... + 1182681.

It is an arithmetic number, because the mean of its divisors is an integer number (338083746).

Almost surely, 2^1349970191 is an apocalyptic number.

1349970191 is a deficient number, since it is larger than the sum of its proper divisors (2364793).

1349970191 is an equidigital number, since it uses as much as digits as its factorization.

1349970191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2364792.

The product of its (nonzero) digits is 61236, while the sum is 44.

The square root of 1349970191 is about 36741.9404903987. The cubic root of 1349970191 is about 1105.2013149178.

The spelling of 1349970191 in words is "one billion, three hundred forty-nine million, nine hundred seventy thousand, one hundred ninety-one".