85561393 has 2 divisors, whose sum is σ = 85561394. Its totient is φ = 85561392.

The previous prime is 85561363. The next prime is 85561417. The reversal of 85561393 is 39316558.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83320384 + 2241009 = 9128^2 + 1497^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85561393 is a prime.

It is not a weakly prime, because it can be changed into another prime (85561363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42780696 + 42780697.

It is an arithmetic number, because the mean of its divisors is an integer number (42780697).

Almost surely, 2^85561393 is an apocalyptic number.

It is an amenable number.

85561393 is a deficient number, since it is larger than the sum of its proper divisors (1).

85561393 is an equidigital number, since it uses as much as digits as its factorization.

85561393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 97200, while the sum is 40.

The square root of 85561393 is about 9249.9401619686. The cubic root of 85561393 is about 440.6488241096.

The spelling of 85561393 in words is "eighty-five million, five hundred sixty-one thousand, three hundred ninety-three".