86731949 has 2 divisors, whose sum is σ = 86731950. Its totient is φ = 86731948.

The previous prime is 86731937. The next prime is 86731963. The reversal of 86731949 is 94913768.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86359849 + 372100 = 9293^2 + 610^2 .

It is a cyclic number.

It is not a de Polignac number, because 86731949 - 2²⁰ = 85683373 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86731349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43365974 + 43365975.

It is an arithmetic number, because the mean of its divisors is an integer number (43365975).

Almost surely, 2^86731949 is an apocalyptic number.

It is an amenable number.

86731949 is a deficient number, since it is larger than the sum of its proper divisors (1).

86731949 is an equidigital number, since it uses as much as digits as its factorization.

86731949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 47.

The square root of 86731949 is about 9312.9989262321. The cubic root of 86731949 is about 442.6492186167.

The spelling of 86731949 in words is "eighty-six million, seven hundred thirty-one thousand, nine hundred forty-nine".