85909451 has 2 divisors, whose sum is σ = 85909452. Its totient is φ = 85909450.

The previous prime is 85909441. The next prime is 85909457. The reversal of 85909451 is 15490958.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85909451 - 2⁶ = 85909387 is a prime.

It is a super-2 number, since 2×85909451² = 14760867542242802, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 85909399 and 85909408.

It is not a weakly prime, because it can be changed into another prime (85909457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42954725 + 42954726.

It is an arithmetic number, because the mean of its divisors is an integer number (42954726).

Almost surely, 2^85909451 is an apocalyptic number.

85909451 is a deficient number, since it is larger than the sum of its proper divisors (1).

85909451 is an equidigital number, since it uses as much as digits as its factorization.

85909451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64800, while the sum is 41.

The square root of 85909451 is about 9268.7351348498. The cubic root of 85909451 is about 441.2455256657.

The spelling of 85909451 in words is "eighty-five million, nine hundred nine thousand, four hundred fifty-one".