67780423 has 2 divisors, whose sum is σ = 67780424. Its totient is φ = 67780422.

The previous prime is 67780417. The next prime is 67780469. The reversal of 67780423 is 32408776.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67780423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67780403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33890211 + 33890212.

It is an arithmetic number, because the mean of its divisors is an integer number (33890212).

Almost surely, 2^67780423 is an apocalyptic number.

67780423 is a deficient number, since it is larger than the sum of its proper divisors (1).

67780423 is an equidigital number, since it uses as much as digits as its factorization.

67780423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56448, while the sum is 37.

The square root of 67780423 is about 8232.8866747940. The cubic root of 67780423 is about 407.7257043148.

The spelling of 67780423 in words is "sixty-seven million, seven hundred eighty thousand, four hundred twenty-three".