86145973 has 2 divisors, whose sum is σ = 86145974. Its totient is φ = 86145972.

The previous prime is 86145947. The next prime is 86145977. The reversal of 86145973 is 37954168.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82137969 + 4008004 = 9063^2 + 2002^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86145973 is a prime.

It is a super-2 number, since 2×86145973² = 14842257328233458, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86145977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43072986 + 43072987.

It is an arithmetic number, because the mean of its divisors is an integer number (43072987).

Almost surely, 2^86145973 is an apocalyptic number.

It is an amenable number.

86145973 is a deficient number, since it is larger than the sum of its proper divisors (1).

86145973 is an equidigital number, since it uses as much as digits as its factorization.

86145973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 43.

The square root of 86145973 is about 9281.4854953289. The cubic root of 86145973 is about 441.6500936624.

It can be divided in two parts, 861 and 45973, that multiplied together give a triangular number (39582753 = T₈₈₉₇).

The spelling of 86145973 in words is "eighty-six million, one hundred forty-five thousand, nine hundred seventy-three".