85698749 has 2 divisors, whose sum is σ = 85698750. Its totient is φ = 85698748.

The previous prime is 85698727. The next prime is 85698757. The reversal of 85698749 is 94789658.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77616100 + 8082649 = 8810^2 + 2843^2 .

It is a cyclic number.

It is not a de Polignac number, because 85698749 - 2²⁰ = 84650173 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 85698694 and 85698703.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85698709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42849374 + 42849375.

It is an arithmetic number, because the mean of its divisors is an integer number (42849375).

Almost surely, 2^85698749 is an apocalyptic number.

It is an amenable number.

85698749 is a deficient number, since it is larger than the sum of its proper divisors (1).

85698749 is an equidigital number, since it uses as much as digits as its factorization.

85698749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4354560, while the sum is 56.

The square root of 85698749 is about 9257.3618812273. The cubic root of 85698749 is about 440.8844966027.

Subtracting 85698749 from its reverse (94789658), we obtain a palindrome (9090909).

The spelling of 85698749 in words is "eighty-five million, six hundred ninety-eight thousand, seven hundred forty-nine".