76443947 has 2 divisors, whose sum is σ = 76443948. Its totient is φ = 76443946.

The previous prime is 76443943. The next prime is 76443953. The reversal of 76443947 is 74934467.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 76443947 - 2² = 76443943 is a prime.

It is a Chen prime.

It is equal to p_4473989 and since 76443947 and 4473989 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 76443898 and 76443907.

It is not a weakly prime, because it can be changed into another prime (76443943) 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, 38221973 + 38221974.

It is an arithmetic number, because the mean of its divisors is an integer number (38221974).

Almost surely, 2^76443947 is an apocalyptic number.

76443947 is a deficient number, since it is larger than the sum of its proper divisors (1).

76443947 is an equidigital number, since it uses as much as digits as its factorization.

76443947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 508032, while the sum is 44.

The square root of 76443947 is about 8743.2229183522. Note that the first 3 decimals coincide. The cubic root of 76443947 is about 424.4055301170.

The spelling of 76443947 in words is "seventy-six million, four hundred forty-three thousand, nine hundred forty-seven".