77450047 has 2 divisors, whose sum is σ = 77450048. Its totient is φ = 77450046.

The previous prime is 77450033. The next prime is 77450071. The reversal of 77450047 is 74005477.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 77450047 - 2⁷ = 77449919 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 77449994 and 77450021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77450077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38725023 + 38725024.

It is an arithmetic number, because the mean of its divisors is an integer number (38725024).

Almost surely, 2^77450047 is an apocalyptic number.

77450047 is a deficient number, since it is larger than the sum of its proper divisors (1).

77450047 is an equidigital number, since it uses as much as digits as its factorization.

77450047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27440, while the sum is 34.

The square root of 77450047 is about 8800.5708337585. The cubic root of 77450047 is about 426.2593272871.

The spelling of 77450047 in words is "seventy-seven million, four hundred fifty thousand, forty-seven".