86173049 has 2 divisors, whose sum is σ = 86173050. Its totient is φ = 86173048.

The previous prime is 86173039. The next prime is 86173057. The reversal of 86173049 is 94037168.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62094400 + 24078649 = 7880^2 + 4907^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86173049 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (86173039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43086524 + 43086525.

It is an arithmetic number, because the mean of its divisors is an integer number (43086525).

Almost surely, 2^86173049 is an apocalyptic number.

It is an amenable number.

86173049 is a deficient number, since it is larger than the sum of its proper divisors (1).

86173049 is an equidigital number, since it uses as much as digits as its factorization.

86173049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 86173049 is about 9282.9439834570. The cubic root of 86173049 is about 441.6963595717.

The spelling of 86173049 in words is "eighty-six million, one hundred seventy-three thousand, forty-nine".