5643772391 has 2 divisors, whose sum is σ = 5643772392. Its totient is φ = 5643772390.

The previous prime is 5643772357. The next prime is 5643772411. The reversal of 5643772391 is 1932773465.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 5643772391 - 2⁶ = 5643772327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5643772091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2821886195 + 2821886196.

It is an arithmetic number, because the mean of its divisors is an integer number (2821886196).

Almost surely, 2^5643772391 is an apocalyptic number.

5643772391 is a deficient number, since it is larger than the sum of its proper divisors (1).

5643772391 is an equidigital number, since it uses as much as digits as its factorization.

5643772391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 952560, while the sum is 47.

The square root of 5643772391 is about 75125.0450316005. The cubic root of 5643772391 is about 1780.4228670669.

The spelling of 5643772391 in words is "five billion, six hundred forty-three million, seven hundred seventy-two thousand, three hundred ninety-one".