471890989081 has 2 divisors, whose sum is σ = 471890989082. Its totient is φ = 471890989080.

The previous prime is 471890989057. The next prime is 471890989099. The reversal of 471890989081 is 180989098174.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 425646637056 + 46244352025 = 652416^2 + 215045^2 .

It is a cyclic number.

It is not a de Polignac number, because 471890989081 - 2¹¹ = 471890987033 is a prime.

It is a super-2 number, since 2×471890989081² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (471890989481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 235945494540 + 235945494541.

It is an arithmetic number, because the mean of its divisors is an integer number (235945494541).

Almost surely, 2^471890989081 is an apocalyptic number.

It is an amenable number.

471890989081 is a deficient number, since it is larger than the sum of its proper divisors (1).

471890989081 is an equidigital number, since it uses as much as digits as its factorization.

471890989081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10450944, while the sum is 64.

The spelling of 471890989081 in words is "four hundred seventy-one billion, eight hundred ninety million, nine hundred eighty-nine thousand, eighty-one".