9201391 has 2 divisors, whose sum is σ = 9201392. Its totient is φ = 9201390.

The previous prime is 9201341. The next prime is 9201407. The reversal of 9201391 is 1931029.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9201391 - 2⁹ = 9200879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9201341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4600695 + 4600696.

It is an arithmetic number, because the mean of its divisors is an integer number (4600696).

Almost surely, 2^9201391 is an apocalyptic number.

9201391 is a deficient number, since it is larger than the sum of its proper divisors (1).

9201391 is an equidigital number, since it uses as much as digits as its factorization.

9201391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 486, while the sum is 25.

The square root of 9201391 is about 3033.3794685136. The cubic root of 9201391 is about 209.5484705092.

The spelling of 9201391 in words is "nine million, two hundred one thousand, three hundred ninety-one".