84443977 has 2 divisors, whose sum is σ = 84443978. Its totient is φ = 84443976.

The previous prime is 84443917. The next prime is 84443987. The reversal of 84443977 is 77934448.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45643536 + 38800441 = 6756^2 + 6229^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84443977 is a prime.

It is not a weakly prime, because it can be changed into another prime (84443917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42221988 + 42221989.

It is an arithmetic number, because the mean of its divisors is an integer number (42221989).

Almost surely, 2^84443977 is an apocalyptic number.

It is an amenable number.

84443977 is a deficient number, since it is larger than the sum of its proper divisors (1).

84443977 is an equidigital number, since it uses as much as digits as its factorization.

84443977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 677376, while the sum is 46.

The square root of 84443977 is about 9189.3404007034. The cubic root of 84443977 is about 438.7221481604.

It can be divided in two parts, 8444 and 3977, that added together give a palindrome (12421).

The spelling of 84443977 in words is "eighty-four million, four hundred forty-three thousand, nine hundred seventy-seven".