678023573 has 2 divisors, whose sum is σ = 678023574. Its totient is φ = 678023572.

The previous prime is 678023543. The next prime is 678023623. The reversal of 678023573 is 375320876.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 571066609 + 106956964 = 23897^2 + 10342^2 .

It is a cyclic number.

It is not a de Polignac number, because 678023573 - 2¹⁰ = 678022549 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 678023573.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (678023543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339011786 + 339011787.

It is an arithmetic number, because the mean of its divisors is an integer number (339011787).

Almost surely, 2^678023573 is an apocalyptic number.

It is an amenable number.

678023573 is a deficient number, since it is larger than the sum of its proper divisors (1).

678023573 is an equidigital number, since it uses as much as digits as its factorization.

678023573 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 211680, while the sum is 41.

The square root of 678023573 is about 26038.8857864541. The cubic root of 678023573 is about 878.5131456372.

The spelling of 678023573 in words is "six hundred seventy-eight million, twenty-three thousand, five hundred seventy-three".