1953091243 has 2 divisors, whose sum is σ = 1953091244. Its totient is φ = 1953091242.

The previous prime is 1953091241. The next prime is 1953091247. The reversal of 1953091243 is 3421903591.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1953091243 - 2¹ = 1953091241 is a prime.

Together with 1953091241, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1953091241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 976545621 + 976545622.

It is an arithmetic number, because the mean of its divisors is an integer number (976545622).

Almost surely, 2^1953091243 is an apocalyptic number.

1953091243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1953091243 is an equidigital number, since it uses as much as digits as its factorization.

1953091243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29160, while the sum is 37.

The square root of 1953091243 is about 44193.7919056512. The cubic root of 1953091243 is about 1249.9927984652.

The spelling of 1953091243 in words is "one billion, nine hundred fifty-three million, ninety-one thousand, two hundred forty-three".