84347477 has 2 divisors, whose sum is σ = 84347478. Its totient is φ = 84347476.

The previous prime is 84347443. The next prime is 84347507. The reversal of 84347477 is 77474348.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47210641 + 37136836 = 6871^2 + 6094^2 .

It is a cyclic number.

It is not a de Polignac number, because 84347477 - 2¹² = 84343381 is a prime.

It is a super-2 number, since 2×84347477² = 14228993752531058, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84347437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42173738 + 42173739.

It is an arithmetic number, because the mean of its divisors is an integer number (42173739).

Almost surely, 2^84347477 is an apocalyptic number.

It is an amenable number.

84347477 is a deficient number, since it is larger than the sum of its proper divisors (1).

84347477 is an equidigital number, since it uses as much as digits as its factorization.

84347477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 526848, while the sum is 44.

The square root of 84347477 is about 9184.0882508826. The cubic root of 84347477 is about 438.5549650327.

The spelling of 84347477 in words is "eighty-four million, three hundred forty-seven thousand, four hundred seventy-seven".