11697989 has 16 divisors (see below), whose sum is σ = 12830400. Its totient is φ = 10623744.

The previous prime is 11697979. The next prime is 11698009. The reversal of 11697989 is 98979611.

It is a cyclic number.

It is not a de Polignac number, because 11697989 - 2⁸ = 11697733 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 (11697919) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107267 + ... + 107375.

It is an arithmetic number, because the mean of its divisors is an integer number (801900).

Almost surely, 2^11697989 is an apocalyptic number.

It is an amenable number.

11697989 is a deficient number, since it is larger than the sum of its proper divisors (1132411).

11697989 is a wasteful number, since it uses less digits than its factorization.

11697989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292.

The product of its digits is 244944, while the sum is 50.

The square root of 11697989 is about 3420.2323020520. The cubic root of 11697989 is about 227.0058606261.

The spelling of 11697989 in words is "eleven million, six hundred ninety-seven thousand, nine hundred eighty-nine".