86923973 has 2 divisors, whose sum is σ = 86923974. Its totient is φ = 86923972.

The previous prime is 86923961. The next prime is 86923981. The reversal of 86923973 is 37932968.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43864129 + 43059844 = 6623^2 + 6562^2 .

It is a cyclic number.

It is not a de Polignac number, because 86923973 - 2⁴ = 86923957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86923913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43461986 + 43461987.

It is an arithmetic number, because the mean of its divisors is an integer number (43461987).

Almost surely, 2^86923973 is an apocalyptic number.

It is an amenable number.

86923973 is a deficient number, since it is larger than the sum of its proper divisors (1).

86923973 is an equidigital number, since it uses as much as digits as its factorization.

86923973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 489888, while the sum is 47.

The square root of 86923973 is about 9323.3026873528. The cubic root of 86923973 is about 442.9756520409.

It can be divided in two parts, 869 and 23973, that added together give a palindrome (24842).

The spelling of 86923973 in words is "eighty-six million, nine hundred twenty-three thousand, nine hundred seventy-three".