85072061 has 2 divisors, whose sum is σ = 85072062. Its totient is φ = 85072060.

The previous prime is 85072033. The next prime is 85072069. The reversal of 85072061 is 16027058.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72148036 + 12924025 = 8494^2 + 3595^2 .

It is a cyclic number.

It is not a de Polignac number, because 85072061 - 2¹⁸ = 84809917 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85072069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42536030 + 42536031.

It is an arithmetic number, because the mean of its divisors is an integer number (42536031).

Almost surely, 2^85072061 is an apocalyptic number.

It is an amenable number.

85072061 is a deficient number, since it is larger than the sum of its proper divisors (1).

85072061 is an equidigital number, since it uses as much as digits as its factorization.

85072061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 85072061 is about 9223.4516857844. The cubic root of 85072061 is about 439.8071830780.

The spelling of 85072061 in words is "eighty-five million, seventy-two thousand, sixty-one".