5547942391 has 2 divisors, whose sum is σ = 5547942392. Its totient is φ = 5547942390.

The previous prime is 5547942383. The next prime is 5547942419. The reversal of 5547942391 is 1932497455.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 5547942391 - 2³ = 5547942383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5547942341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2773971195 + 2773971196.

It is an arithmetic number, because the mean of its divisors is an integer number (2773971196).

Almost surely, 2^5547942391 is an apocalyptic number.

5547942391 is a deficient number, since it is larger than the sum of its proper divisors (1).

5547942391 is an equidigital number, since it uses as much as digits as its factorization.

5547942391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1360800, while the sum is 49.

The square root of 5547942391 is about 74484.5110811637. The cubic root of 5547942391 is about 1770.2882260155.

The spelling of 5547942391 in words is "five billion, five hundred forty-seven million, nine hundred forty-two thousand, three hundred ninety-one".