10997591 has 8 divisors (see below), whose sum is σ = 12384768. Its totient is φ = 9675000.

The previous prime is 10997579. The next prime is 10997593. The reversal of 10997591 is 19579901.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 10997591 - 2¹⁴ = 10981207 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10997593) 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, 15785 + ... + 16466.

It is an arithmetic number, because the mean of its divisors is an integer number (1548096).

Almost surely, 2^10997591 is an apocalyptic number.

10997591 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

10997591 is a deficient number, since it is larger than the sum of its proper divisors (1387177).

10997591 is a wasteful number, since it uses less digits than its factorization.

10997591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32293.

The product of its (nonzero) digits is 25515, while the sum is 41.

The square root of 10997591 is about 3316.2616000551. The cubic root of 10997591 is about 222.3817728170.

The spelling of 10997591 in words is "ten million, nine hundred ninety-seven thousand, five hundred ninety-one".