47161027421 has 2 divisors, whose sum is σ = 47161027422. Its totient is φ = 47161027420.

The previous prime is 47161027409. The next prime is 47161027451. The reversal of 47161027421 is 12472016174.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23920024921 + 23241002500 = 154661^2 + 152450^2 .

It is a cyclic number.

It is not a de Polignac number, because 47161027421 - 2¹⁸ = 47160765277 is a prime.

It is a super-2 number, since 2×47161027421² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47161027451) 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, 23580513710 + 23580513711.

It is an arithmetic number, because the mean of its divisors is an integer number (23580513711).

Almost surely, 2^47161027421 is an apocalyptic number.

It is an amenable number.

47161027421 is a deficient number, since it is larger than the sum of its proper divisors (1).

47161027421 is an equidigital number, since it uses as much as digits as its factorization.

47161027421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18816, while the sum is 35.

The spelling of 47161027421 in words is "forty-seven billion, one hundred sixty-one million, twenty-seven thousand, four hundred twenty-one".