85723237 has 2 divisors, whose sum is σ = 85723238. Its totient is φ = 85723236.

The previous prime is 85723189. The next prime is 85723249. The reversal of 85723237 is 73232758.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75794436 + 9928801 = 8706^2 + 3151^2 .

It is a cyclic number.

It is not a de Polignac number, because 85723237 - 2²³ = 77334629 is a prime.

It is equal to p_4983292 and since 85723237 and 4983292 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 85723196 and 85723205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85723837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42861618 + 42861619.

It is an arithmetic number, because the mean of its divisors is an integer number (42861619).

Almost surely, 2^85723237 is an apocalyptic number.

It is an amenable number.

85723237 is a deficient number, since it is larger than the sum of its proper divisors (1).

85723237 is an equidigital number, since it uses as much as digits as its factorization.

85723237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 70560, while the sum is 37.

The square root of 85723237 is about 9258.6844097852. The cubic root of 85723237 is about 440.9264861358.

The spelling of 85723237 in words is "eighty-five million, seven hundred twenty-three thousand, two hundred thirty-seven".