906391 has 2 divisors, whose sum is σ = 906392. Its totient is φ = 906390.

The previous prime is 906383. The next prime is 906403. The reversal of 906391 is 193609.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 906391 - 2³ = 906383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (906331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 453195 + 453196.

It is an arithmetic number, because the mean of its divisors is an integer number (453196).

2⁹⁰⁶³⁹¹ is an apocalyptic number.

906391 is a deficient number, since it is larger than the sum of its proper divisors (1).

906391 is an equidigital number, since it uses as much as digits as its factorization.

906391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1458, while the sum is 28.

The square root of 906391 is about 952.0456921808. The cubic root of 906391 is about 96.7769345472.

The spelling of 906391 in words is "nine hundred six thousand, three hundred ninety-one".