1045977391 has 2 divisors, whose sum is σ = 1045977392. Its totient is φ = 1045977390.

The previous prime is 1045977389. The next prime is 1045977397. The reversal of 1045977391 is 1937795401.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1045977391 - 2¹ = 1045977389 is a prime.

Together with 1045977389, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1045977397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 522988695 + 522988696.

It is an arithmetic number, because the mean of its divisors is an integer number (522988696).

Almost surely, 2^1045977391 is an apocalyptic number.

1045977391 is a deficient number, since it is larger than the sum of its proper divisors (1).

1045977391 is an equidigital number, since it uses as much as digits as its factorization.

1045977391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 238140, while the sum is 46.

The square root of 1045977391 is about 32341.5737248514. The cubic root of 1045977391 is about 1015.0967385775.

The spelling of 1045977391 in words is "one billion, forty-five million, nine hundred seventy-seven thousand, three hundred ninety-one".