11538979 has 2 divisors, whose sum is σ = 11538980. Its totient is φ = 11538978.

The previous prime is 11538973. The next prime is 11538997. The reversal of 11538979 is 97983511.

Together with next prime (11538997) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11538979 - 2⁹ = 11538467 is a prime.

It is equal to p₇₅₉₆₉₇ and since 11538979 and 759697 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (11538973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5769489 + 5769490.

It is an arithmetic number, because the mean of its divisors is an integer number (5769490).

Almost surely, 2^11538979 is an apocalyptic number.

11538979 is a deficient number, since it is larger than the sum of its proper divisors (1).

11538979 is an equidigital number, since it uses as much as digits as its factorization.

11538979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 68040, while the sum is 43.

The square root of 11538979 is about 3396.9072698559. The cubic root of 11538979 is about 225.9726061244.

The spelling of 11538979 in words is "eleven million, five hundred thirty-eight thousand, nine hundred seventy-nine".