84872617 has 2 divisors, whose sum is σ = 84872618. Its totient is φ = 84872616.

The previous prime is 84872603. The next prime is 84872651. The reversal of 84872617 is 71627848.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75533481 + 9339136 = 8691^2 + 3056^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84872617 is a prime.

It is a super-2 number, since 2×84872617² = 14406722232857378, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (84872657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42436308 + 42436309.

It is an arithmetic number, because the mean of its divisors is an integer number (42436309).

Almost surely, 2^84872617 is an apocalyptic number.

It is an amenable number.

84872617 is a deficient number, since it is larger than the sum of its proper divisors (1).

84872617 is an equidigital number, since it uses as much as digits as its factorization.

84872617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 150528, while the sum is 43.

The square root of 84872617 is about 9212.6335539844. The cubic root of 84872617 is about 439.4632176586.

The spelling of 84872617 in words is "eighty-four million, eight hundred seventy-two thousand, six hundred seventeen".