678322511 has 2 divisors, whose sum is σ = 678322512. Its totient is φ = 678322510.

The previous prime is 678322493. The next prime is 678322523. The reversal of 678322511 is 115223876.

It is a happy number.

678322511 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 678322511 - 2¹⁴ = 678306127 is a prime.

It is a Chen prime.

It is equal to p_35187524 and since 678322511 and 35187524 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (678322531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339161255 + 339161256.

It is an arithmetic number, because the mean of its divisors is an integer number (339161256).

Almost surely, 2^678322511 is an apocalyptic number.

678322511 is a deficient number, since it is larger than the sum of its proper divisors (1).

678322511 is an equidigital number, since it uses as much as digits as its factorization.

678322511 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 35.

The square root of 678322511 is about 26044.6253764572. The cubic root of 678322511 is about 878.6422376955.

The spelling of 678322511 in words is "six hundred seventy-eight million, three hundred twenty-two thousand, five hundred eleven".