11697819 has 48 divisors (see below), whose sum is σ = 19961856. Its totient is φ = 6048000.

The previous prime is 11697811. The next prime is 11697821. The reversal of 11697819 is 91879611.

It is not a de Polignac number, because 11697819 - 2³ = 11697811 is a prime.

It is a super-2 number, since 2×11697819² = 273677938713522, which contains 22 as substring.

Its product of digits (27216) is a multiple of the sum of its prime factors (216).

It is not an unprimeable number, because it can be changed into a prime (11697811) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 77394 + ... + 77544.

It is an arithmetic number, because the mean of its divisors is an integer number (415872).

Almost surely, 2^11697819 is an apocalyptic number.

11697819 is a deficient number, since it is larger than the sum of its proper divisors (8264037).

11697819 is a wasteful number, since it uses less digits than its factorization.

11697819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216 (or 209 counting only the distinct ones).

The product of its digits is 27216, while the sum is 42.

The square root of 11697819 is about 3420.2074498486. The cubic root of 11697819 is about 227.0047609732.

The spelling of 11697819 in words is "eleven million, six hundred ninety-seven thousand, eight hundred nineteen".