85891357 has 2 divisors, whose sum is σ = 85891358. Its totient is φ = 85891356.

The previous prime is 85891331. The next prime is 85891411. The reversal of 85891357 is 75319858.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81974916 + 3916441 = 9054^2 + 1979^2 .

It is a cyclic number.

It is not a de Polignac number, because 85891357 - 2²³ = 77502749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85891307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42945678 + 42945679.

It is an arithmetic number, because the mean of its divisors is an integer number (42945679).

Almost surely, 2^85891357 is an apocalyptic number.

It is an amenable number.

85891357 is a deficient number, since it is larger than the sum of its proper divisors (1).

85891357 is an equidigital number, since it uses as much as digits as its factorization.

85891357 is an evil number, because the sum of its binary digits is even.

The product of its digits is 302400, while the sum is 46.

The square root of 85891357 is about 9267.7590063618. The cubic root of 85891357 is about 441.2145455387.

The spelling of 85891357 in words is "eighty-five million, eight hundred ninety-one thousand, three hundred fifty-seven".