9506991 has 8 divisors (see below), whose sum is σ = 13651120. Its totient is φ = 5850432.

The previous prime is 9506969. The next prime is 9507007. The reversal of 9506991 is 1996059.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9506991 - 2¹³ = 9498799 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 243769 = 9506991 / (9 + 5 + 0 + 6 + 9 + 9 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9506921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121846 + ... + 121923.

It is an arithmetic number, because the mean of its divisors is an integer number (1706390).

Almost surely, 2^9506991 is an apocalyptic number.

9506991 is a deficient number, since it is larger than the sum of its proper divisors (4144129).

9506991 is a wasteful number, since it uses less digits than its factorization.

9506991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243785.

The product of its (nonzero) digits is 21870, while the sum is 39.

The square root of 9506991 is about 3083.3408828736. The cubic root of 9506991 is about 211.8431184789.

The spelling of 9506991 in words is "nine million, five hundred six thousand, nine hundred ninety-one".