997763479 has 2 divisors, whose sum is σ = 997763480. Its totient is φ = 997763478.

The previous prime is 997763471. The next prime is 997763521. The reversal of 997763479 is 974367799.

It is a weak prime.

It is an emirp because it is prime and its reverse (974367799) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 997763479 - 2³ = 997763471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (997763471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498881739 + 498881740.

It is an arithmetic number, because the mean of its divisors is an integer number (498881740).

Almost surely, 2^997763479 is an apocalyptic number.

997763479 is a deficient number, since it is larger than the sum of its proper divisors (1).

997763479 is an equidigital number, since it uses as much as digits as its factorization.

997763479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18003384, while the sum is 61.

The square root of 997763479 is about 31587.3943053238. The cubic root of 997763479 is about 999.2539365277.

The spelling of 997763479 in words is "nine hundred ninety-seven million, seven hundred sixty-three thousand, four hundred seventy-nine".