945391 has 2 divisors, whose sum is σ = 945392. Its totient is φ = 945390.

The previous prime is 945389. The next prime is 945397. The reversal of 945391 is 193549.

It is a weak prime.

It is an emirp because it is prime and its reverse (193549) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 945391 - 2¹ = 945389 is a prime.

Together with 945389, it forms a pair of twin primes.

945391 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (945397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 472695 + 472696.

It is an arithmetic number, because the mean of its divisors is an integer number (472696).

2⁹⁴⁵³⁹¹ is an apocalyptic number.

945391 is a deficient number, since it is larger than the sum of its proper divisors (1).

945391 is an equidigital number, since it uses as much as digits as its factorization.

945391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4860, while the sum is 31.

The square root of 945391 is about 972.3121926624. The cubic root of 945391 is about 98.1455216927.

The spelling of 945391 in words is "nine hundred forty-five thousand, three hundred ninety-one".