545097391 has 2 divisors, whose sum is σ = 545097392. Its totient is φ = 545097390.

The previous prime is 545097389. The next prime is 545097433. The reversal of 545097391 is 193790545.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 545097391 - 2¹ = 545097389 is a prime.

Together with 545097389, 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 (545097341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272548695 + 272548696.

It is an arithmetic number, because the mean of its divisors is an integer number (272548696).

Almost surely, 2^545097391 is an apocalyptic number.

545097391 is a deficient number, since it is larger than the sum of its proper divisors (1).

545097391 is an equidigital number, since it uses as much as digits as its factorization.

545097391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 170100, while the sum is 43.

The square root of 545097391 is about 23347.3208527231. The cubic root of 545097391 is about 816.8795697776.

The spelling of 545097391 in words is "five hundred forty-five million, ninety-seven thousand, three hundred ninety-one".