2730198391 has 4 divisors (see below), whose sum is σ = 2776473000. Its totient is φ = 2683923784.

The previous prime is 2730198349. The next prime is 2730198421. The reversal of 2730198391 is 1938910372.

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 2730198391 - 2¹⁵ = 2730165623 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 (2730108391) 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, 23137216 + ... + 23137333.

It is an arithmetic number, because the mean of its divisors is an integer number (694118250).

Almost surely, 2^2730198391 is an apocalyptic number.

2730198391 is a deficient number, since it is larger than the sum of its proper divisors (46274609).

2730198391 is an equidigital number, since it uses as much as digits as its factorization.

2730198391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46274608.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 2730198391 is about 52251.3003761629. The cubic root of 2730198391 is about 1397.6488412616.

The spelling of 2730198391 in words is "two billion, seven hundred thirty million, one hundred ninety-eight thousand, three hundred ninety-one".