10999979 has 2 divisors, whose sum is σ = 10999980. Its totient is φ = 10999978.

The previous prime is 10999951. The next prime is 10999987. The reversal of 10999979 is 97999901.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10999979 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10999979.

It is not a weakly prime, because it can be changed into another prime (10999949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5499989 + 5499990.

It is an arithmetic number, because the mean of its divisors is an integer number (5499990).

Almost surely, 2^10999979 is an apocalyptic number.

10999979 is a deficient number, since it is larger than the sum of its proper divisors (1).

10999979 is an equidigital number, since it uses as much as digits as its factorization.

10999979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 413343, while the sum is 53.

The square root of 10999979 is about 3316.6216244848. The cubic root of 10999979 is about 222.3978675308.

The spelling of 10999979 in words is "ten million, nine hundred ninety-nine thousand, nine hundred seventy-nine".