9130391 has 4 divisors (see below), whose sum is σ = 9185232. Its totient is φ = 9075552.

The previous prime is 9130357. The next prime is 9130423. The reversal of 9130391 is 1930319.

9130391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1930319 = 349 ⋅5531.

It is a cyclic number.

It is not a de Polignac number, because 9130391 - 2¹⁸ = 8868247 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9130391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9130301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27170 + ... + 27503.

It is an arithmetic number, because the mean of its divisors is an integer number (2296308).

Almost surely, 2^9130391 is an apocalyptic number.

9130391 is a deficient number, since it is larger than the sum of its proper divisors (54841).

9130391 is a wasteful number, since it uses less digits than its factorization.

9130391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54840.

The product of its (nonzero) digits is 729, while the sum is 26.

The square root of 9130391 is about 3021.6536863115. The cubic root of 9130391 is about 209.0081038958.

The spelling of 9130391 in words is "nine million, one hundred thirty thousand, three hundred ninety-one".