71778467 has 2 divisors, whose sum is σ = 71778468. Its totient is φ = 71778466.

The previous prime is 71778449. The next prime is 71778503. The reversal of 71778467 is 76487717.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71778467 - 2⁸ = 71778211 is a prime.

It is not a weakly prime, because it can be changed into another prime (71778407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35889233 + 35889234.

It is an arithmetic number, because the mean of its divisors is an integer number (35889234).

Almost surely, 2^71778467 is an apocalyptic number.

71778467 is a deficient number, since it is larger than the sum of its proper divisors (1).

71778467 is an equidigital number, since it uses as much as digits as its factorization.

71778467 is an evil number, because the sum of its binary digits is even.

The product of its digits is 460992, while the sum is 47.

The square root of 71778467 is about 8472.2173602900. The cubic root of 71778467 is about 415.5896529157.

The spelling of 71778467 in words is "seventy-one million, seven hundred seventy-eight thousand, four hundred sixty-seven".