9747391 has 4 divisors (see below), whose sum is σ = 10010872. Its totient is φ = 9483912.

The previous prime is 9747383. The next prime is 9747401. The reversal of 9747391 is 1937479.

9747391 = 89² + 90² + ... + 310².

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1937479 = 811 ⋅2389.

It is a cyclic number.

It is not a de Polignac number, because 9747391 - 2³ = 9747383 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9747301) 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, 131685 + ... + 131758.

It is an arithmetic number, because the mean of its divisors is an integer number (2502718).

Almost surely, 2^9747391 is an apocalyptic number.

9747391 is a deficient number, since it is larger than the sum of its proper divisors (263481).

9747391 is a wasteful number, since it uses less digits than its factorization.

9747391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263480.

The product of its digits is 47628, while the sum is 40.

The square root of 9747391 is about 3122.0811968941. The cubic root of 9747391 is about 213.6138770576.

The spelling of 9747391 in words is "nine million, seven hundred forty-seven thousand, three hundred ninety-one".