85072387 has 2 divisors, whose sum is σ = 85072388. Its totient is φ = 85072386.

The previous prime is 85072363. The next prime is 85072439. The reversal of 85072387 is 78327058.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85072387 - 2⁷ = 85072259 is a prime.

It is a super-2 number, since 2×85072387² = 14474622059755538, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (85072327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42536193 + 42536194.

It is an arithmetic number, because the mean of its divisors is an integer number (42536194).

Almost surely, 2^85072387 is an apocalyptic number.

85072387 is a deficient number, since it is larger than the sum of its proper divisors (1).

85072387 is an equidigital number, since it uses as much as digits as its factorization.

85072387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 94080, while the sum is 40.

The square root of 85072387 is about 9223.4693581103. The cubic root of 85072387 is about 439.8077448644.

It can be divided in two parts, 850 and 72387, that added together give a palindrome (73237).

The spelling of 85072387 in words is "eighty-five million, seventy-two thousand, three hundred eighty-seven".