911947979 has 2 divisors, whose sum is σ = 911947980. Its totient is φ = 911947978.

The previous prime is 911947969. The next prime is 911948033. The reversal of 911947979 is 979749119.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (979749119) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 911947979 - 2¹⁶ = 911882443 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (911947919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 455973989 + 455973990.

It is an arithmetic number, because the mean of its divisors is an integer number (455973990).

Almost surely, 2^911947979 is an apocalyptic number.

911947979 is a deficient number, since it is larger than the sum of its proper divisors (1).

911947979 is an equidigital number, since it uses as much as digits as its factorization.

911947979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1285956, while the sum is 56.

The square root of 911947979 is about 30198.4764350786. The cubic root of 911947979 is about 969.7430782341.

The spelling of 911947979 in words is "nine hundred eleven million, nine hundred forty-seven thousand, nine hundred seventy-nine".