678023623 has 2 divisors, whose sum is σ = 678023624. Its totient is φ = 678023622.

The previous prime is 678023573. The next prime is 678023639. The reversal of 678023623 is 326320876.

678023623 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 678023623 - 2⁹ = 678023111 is a prime.

It is a super-2 number, since 2×678023623² = 919432066692092258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (678023653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339011811 + 339011812.

It is an arithmetic number, because the mean of its divisors is an integer number (339011812).

Almost surely, 2^678023623 is an apocalyptic number.

678023623 is a deficient number, since it is larger than the sum of its proper divisors (1).

678023623 is an equidigital number, since it uses as much as digits as its factorization.

678023623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 37.

The square root of 678023623 is about 26038.8867465566. The cubic root of 678023623 is about 878.5131672321.

It can be divided in two parts, 6780 and 23623, that added together give a palindrome (30403).

The spelling of 678023623 in words is "six hundred seventy-eight million, twenty-three thousand, six hundred twenty-three".