86378437 has 2 divisors, whose sum is σ = 86378438. Its totient is φ = 86378436.

The previous prime is 86378423. The next prime is 86378489. The reversal of 86378437 is 73487368.

It is a Cunningham number, because it is equal to 9294²+1.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86378436 + 1 = 9294^2 + 1^2 .

It is a cyclic number.

It is not a de Polignac number, because 86378437 - 2¹⁹ = 85854149 is a prime.

It is a super-2 number, since 2×86378437² = 14922468757125938, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86378137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43189218 + 43189219.

It is an arithmetic number, because the mean of its divisors is an integer number (43189219).

Almost surely, 2^86378437 is an apocalyptic number.

It is an amenable number.

86378437 is a deficient number, since it is larger than the sum of its proper divisors (1).

86378437 is an equidigital number, since it uses as much as digits as its factorization.

86378437 is an evil number, because the sum of its binary digits is even.

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

The square root of 86378437 is about 9294.0000537981. Note that the first 4 decimals coincide. The cubic root of 86378437 is about 442.0469995680.

The spelling of 86378437 in words is "eighty-six million, three hundred seventy-eight thousand, four hundred thirty-seven".