10990997 has 4 divisors (see below), whose sum is σ = 11224896. Its totient is φ = 10757100.

The previous prime is 10990963. The next prime is 10991003. The reversal of 10990997 is 79909901.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 79909901 = 3181 ⋅25121.

It is a cyclic number.

It is not a de Polignac number, because 10990997 - 2⁸ = 10990741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10990937) 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, 116879 + ... + 116972.

It is an arithmetic number, because the mean of its divisors is an integer number (2806224).

Almost surely, 2^10990997 is an apocalyptic number.

It is an amenable number.

10990997 is a deficient number, since it is larger than the sum of its proper divisors (233899).

10990997 is an equidigital number, since it uses as much as digits as its factorization.

10990997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233898.

The product of its (nonzero) digits is 45927, while the sum is 44.

The square root of 10990997 is about 3315.2672592115. The cubic root of 10990997 is about 222.3373182759.

The spelling of 10990997 in words is "ten million, nine hundred ninety thousand, nine hundred ninety-seven".