11971319 has 4 divisors (see below), whose sum is σ = 11991840. Its totient is φ = 11950800.

The previous prime is 11971261. The next prime is 11971321. The reversal of 11971319 is 91317911.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91317911 = 109 ⋅837779.

It is a cyclic number.

It is not a de Polignac number, because 11971319 - 2¹² = 11967223 is a prime.

It is a super-2 number, since 2×11971319² = 286624957199522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11971369) 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, 9359 + ... + 10560.

It is an arithmetic number, because the mean of its divisors is an integer number (2997960).

Almost surely, 2^11971319 is an apocalyptic number.

11971319 is a deficient number, since it is larger than the sum of its proper divisors (20521).

11971319 is an equidigital number, since it uses as much as digits as its factorization.

11971319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20520.

The product of its digits is 1701, while the sum is 32.

The square root of 11971319 is about 3459.9593928253. The cubic root of 11971319 is about 228.7603055068.

The spelling of 11971319 in words is "eleven million, nine hundred seventy-one thousand, three hundred nineteen".