76438169 has 2 divisors, whose sum is σ = 76438170. Its totient is φ = 76438168.

The previous prime is 76438151. The next prime is 76438181. The reversal of 76438169 is 96183467.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54582544 + 21855625 = 7388^2 + 4675^2 .

It is a cyclic number.

It is not a de Polignac number, because 76438169 - 2⁸ = 76437913 is a prime.

It is a super-2 number, since 2×76438169² = 11685587360145122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (76438129) 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, 38219084 + 38219085.

It is an arithmetic number, because the mean of its divisors is an integer number (38219085).

Almost surely, 2^76438169 is an apocalyptic number.

It is an amenable number.

76438169 is a deficient number, since it is larger than the sum of its proper divisors (1).

76438169 is an equidigital number, since it uses as much as digits as its factorization.

76438169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 44.

The square root of 76438169 is about 8742.8924847558. The cubic root of 76438169 is about 424.3948369794.

The spelling of 76438169 in words is "seventy-six million, four hundred thirty-eight thousand, one hundred sixty-nine".