684470053 has 2 divisors, whose sum is σ = 684470054. Its totient is φ = 684470052.

The previous prime is 684470021. The next prime is 684470077. The reversal of 684470053 is 350074486.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 619860609 + 64609444 = 24897^2 + 8038^2 .

It is a cyclic number.

It is not a de Polignac number, because 684470053 - 2⁵ = 684470021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 684469994 and 684470021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (684470653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342235026 + 342235027.

It is an arithmetic number, because the mean of its divisors is an integer number (342235027).

Almost surely, 2^684470053 is an apocalyptic number.

It is an amenable number.

684470053 is a deficient number, since it is larger than the sum of its proper divisors (1).

684470053 is an equidigital number, since it uses as much as digits as its factorization.

684470053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80640, while the sum is 37.

The square root of 684470053 is about 26162.3785807025. The cubic root of 684470053 is about 881.2885964149.

The spelling of 684470053 in words is "six hundred eighty-four million, four hundred seventy thousand, fifty-three".