85139357 has 2 divisors, whose sum is σ = 85139358. Its totient is φ = 85139356.

The previous prime is 85139339. The next prime is 85139371. The reversal of 85139357 is 75393158.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70744921 + 14394436 = 8411^2 + 3794^2 .

It is a cyclic number.

It is not a de Polignac number, because 85139357 - 2⁶ = 85139293 is a prime.

It is a super-2 number, since 2×85139357² = 14497420220746898, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85139317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42569678 + 42569679.

It is an arithmetic number, because the mean of its divisors is an integer number (42569679).

Almost surely, 2^85139357 is an apocalyptic number.

It is an amenable number.

85139357 is a deficient number, since it is larger than the sum of its proper divisors (1).

85139357 is an equidigital number, since it uses as much as digits as its factorization.

85139357 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 113400, while the sum is 41.

The square root of 85139357 is about 9227.0990565833. The cubic root of 85139357 is about 439.9231218990.

The spelling of 85139357 in words is "eighty-five million, one hundred thirty-nine thousand, three hundred fifty-seven".