683977493 has 2 divisors, whose sum is σ = 683977494. Its totient is φ = 683977492.

The previous prime is 683977453. The next prime is 683977517. The reversal of 683977493 is 394779386.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 540888049 + 143089444 = 23257^2 + 11962^2 .

It is a cyclic number.

It is not a de Polignac number, because 683977493 - 2⁸ = 683977237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (683977433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 341988746 + 341988747.

It is an arithmetic number, because the mean of its divisors is an integer number (341988747).

Almost surely, 2^683977493 is an apocalyptic number.

It is an amenable number.

683977493 is a deficient number, since it is larger than the sum of its proper divisors (1).

683977493 is an equidigital number, since it uses as much as digits as its factorization.

683977493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6858432, while the sum is 56.

The square root of 683977493 is about 26152.9633693775. The cubic root of 683977493 is about 881.0771473398.

The spelling of 683977493 in words is "six hundred eighty-three million, nine hundred seventy-seven thousand, four hundred ninety-three".