85714381 has 2 divisors, whose sum is σ = 85714382. Its totient is φ = 85714380.

The previous prime is 85714331. The next prime is 85714397. The reversal of 85714381 is 18341758.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75255625 + 10458756 = 8675^2 + 3234^2 .

It is a cyclic number.

It is not a de Polignac number, because 85714381 - 2¹⁹ = 85190093 is a prime.

It is a super-2 number, since 2×85714381² = 14693910220426322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 85714381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85714331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42857190 + 42857191.

It is an arithmetic number, because the mean of its divisors is an integer number (42857191).

Almost surely, 2^85714381 is an apocalyptic number.

It is an amenable number.

85714381 is a deficient number, since it is larger than the sum of its proper divisors (1).

85714381 is an equidigital number, since it uses as much as digits as its factorization.

85714381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26880, while the sum is 37.

The square root of 85714381 is about 9258.2061437408. The cubic root of 85714381 is about 440.9113016904.

The spelling of 85714381 in words is "eighty-five million, seven hundred fourteen thousand, three hundred eighty-one".