86782541 has 2 divisors, whose sum is σ = 86782542. Its totient is φ = 86782540.

The previous prime is 86782537. The next prime is 86782567. The reversal of 86782541 is 14528768.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74321641 + 12460900 = 8621^2 + 3530^2 .

It is a cyclic number.

It is not a de Polignac number, because 86782541 - 2² = 86782537 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86782511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43391270 + 43391271.

It is an arithmetic number, because the mean of its divisors is an integer number (43391271).

Almost surely, 2^86782541 is an apocalyptic number.

It is an amenable number.

86782541 is a deficient number, since it is larger than the sum of its proper divisors (1).

86782541 is an equidigital number, since it uses as much as digits as its factorization.

86782541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 107520, while the sum is 41.

The square root of 86782541 is about 9315.7147337174. The cubic root of 86782541 is about 442.7352697839.

The spelling of 86782541 in words is "eighty-six million, seven hundred eighty-two thousand, five hundred forty-one".