747979 has 2 divisors, whose sum is σ = 747980. Its totient is φ = 747978.

The previous prime is 747977. The next prime is 747991. The reversal of 747979 is 979747.

It is a weak prime.

It is an emirp because it is prime and its reverse (979747) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 747979 - 2¹ = 747977 is a prime.

Together with 747977, it forms a pair of twin primes.

It is a nialpdrome in base 15.

It is not a weakly prime, because it can be changed into another prime (747977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 373989 + 373990.

It is an arithmetic number, because the mean of its divisors is an integer number (373990).

2⁷⁴⁷⁹⁷⁹ is an apocalyptic number.

747979 is a deficient number, since it is larger than the sum of its proper divisors (1).

747979 is an equidigital number, since it uses as much as digits as its factorization.

747979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 111132, while the sum is 43.

The square root of 747979 is about 864.8577917785. The cubic root of 747979 is about 90.7743473239.

The spelling of 747979 in words is "seven hundred forty-seven thousand, nine hundred seventy-nine".