10997639 has 4 divisors (see below), whose sum is σ = 11021856. Its totient is φ = 10973424.

The previous prime is 10997633. The next prime is 10997647. The reversal of 10997639 is 93679901.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10997639 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 10997639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10997633) 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, 11414 + ... + 12339.

It is an arithmetic number, because the mean of its divisors is an integer number (2755464).

Almost surely, 2^10997639 is an apocalyptic number.

10997639 is a deficient number, since it is larger than the sum of its proper divisors (24217).

10997639 is an equidigital number, since it uses as much as digits as its factorization.

10997639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24216.

The product of its (nonzero) digits is 91854, while the sum is 44.

The square root of 10997639 is about 3316.2688371120. The cubic root of 10997639 is about 222.3820963517.

The spelling of 10997639 in words is "ten million, nine hundred ninety-seven thousand, six hundred thirty-nine".