47217457477 has 2 divisors, whose sum is σ = 47217457478. Its totient is φ = 47217457476.

The previous prime is 47217457453. The next prime is 47217457489. The reversal of 47217457477 is 77475471274.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28925165476 + 18292292001 = 170074^2 + 135249^2 .

It is a cyclic number.

It is not a de Polignac number, because 47217457477 - 2⁷ = 47217457349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47217457877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23608728738 + 23608728739.

It is an arithmetic number, because the mean of its divisors is an integer number (23608728739).

Almost surely, 2^47217457477 is an apocalyptic number.

It is an amenable number.

47217457477 is a deficient number, since it is larger than the sum of its proper divisors (1).

47217457477 is an equidigital number, since it uses as much as digits as its factorization.

47217457477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10756480, while the sum is 55.

The spelling of 47217457477 in words is "forty-seven billion, two hundred seventeen million, four hundred fifty-seven thousand, four hundred seventy-seven".