68400623 has 2 divisors, whose sum is σ = 68400624. Its totient is φ = 68400622.

The previous prime is 68400599. The next prime is 68400637. The reversal of 68400623 is 32600486.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68400623 - 2¹⁸ = 68138479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68400023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34200311 + 34200312.

It is an arithmetic number, because the mean of its divisors is an integer number (34200312).

Almost surely, 2^68400623 is an apocalyptic number.

68400623 is a deficient number, since it is larger than the sum of its proper divisors (1).

68400623 is an equidigital number, since it uses as much as digits as its factorization.

68400623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 68400623 is about 8270.4669154770. The cubic root of 68400623 is about 408.9655122033.

The spelling of 68400623 in words is "sixty-eight million, four hundred thousand, six hundred twenty-three".