9151391 has 2 divisors, whose sum is σ = 9151392. Its totient is φ = 9151390.

The previous prime is 9151381. The next prime is 9151397. The reversal of 9151391 is 1931519.

It is a strong prime.

It is an emirp because it is prime and its reverse (1931519) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9151391 - 2²² = 4957087 is a prime.

It is a Chen prime.

It is equal to p₆₁₁₈₇₆ and since 9151391 and 611876 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9151397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4575695 + 4575696.

It is an arithmetic number, because the mean of its divisors is an integer number (4575696).

Almost surely, 2^9151391 is an apocalyptic number.

9151391 is a deficient number, since it is larger than the sum of its proper divisors (1).

9151391 is an equidigital number, since it uses as much as digits as its factorization.

9151391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1215, while the sum is 29.

The square root of 9151391 is about 3025.1266089207. The cubic root of 9151391 is about 209.1682215158.

The spelling of 9151391 in words is "nine million, one hundred fifty-one thousand, three hundred ninety-one".