997464779 has 2 divisors, whose sum is σ = 997464780. Its totient is φ = 997464778.

The previous prime is 997464761. The next prime is 997464799. The reversal of 997464779 is 977464799.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-997464779 is a prime.

It is not a weakly prime, because it can be changed into another prime (997464739) 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, 498732389 + 498732390.

It is an arithmetic number, because the mean of its divisors is an integer number (498732390).

Almost surely, 2^997464779 is an apocalyptic number.

997464779 is a deficient number, since it is larger than the sum of its proper divisors (1).

997464779 is an equidigital number, since it uses as much as digits as its factorization.

997464779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24004512, while the sum is 62.

The square root of 997464779 is about 31582.6657994540. The cubic root of 997464779 is about 999.1542111763.

The spelling of 997464779 in words is "nine hundred ninety-seven million, four hundred sixty-four thousand, seven hundred seventy-nine".