212671477 has 2 divisors, whose sum is σ = 212671478. Its totient is φ = 212671476.

The previous prime is 212671451. The next prime is 212671517. The reversal of 212671477 is 774176212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 209409841 + 3261636 = 14471^2 + 1806^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212671477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212621477) 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, 106335738 + 106335739.

It is an arithmetic number, because the mean of its divisors is an integer number (106335739).

Almost surely, 2^212671477 is an apocalyptic number.

It is an amenable number.

212671477 is a deficient number, since it is larger than the sum of its proper divisors (1).

212671477 is an equidigital number, since it uses as much as digits as its factorization.

212671477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32928, while the sum is 37.

The square root of 212671477 is about 14583.2601636260. The cubic root of 212671477 is about 596.9020664681.

The spelling of 212671477 in words is "two hundred twelve million, six hundred seventy-one thousand, four hundred seventy-seven".