85434691 has 2 divisors, whose sum is σ = 85434692. Its totient is φ = 85434690.

The previous prime is 85434653. The next prime is 85434703. The reversal of 85434691 is 19643458.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85434691 - 2¹³ = 85426499 is a prime.

It is not a weakly prime, because it can be changed into another prime (85434631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42717345 + 42717346.

It is an arithmetic number, because the mean of its divisors is an integer number (42717346).

Almost surely, 2^85434691 is an apocalyptic number.

85434691 is a deficient number, since it is larger than the sum of its proper divisors (1).

85434691 is an equidigital number, since it uses as much as digits as its factorization.

85434691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 103680, while the sum is 40.

The square root of 85434691 is about 9243.0888235481. The cubic root of 85434691 is about 440.4312077803.

The spelling of 85434691 in words is "eighty-five million, four hundred thirty-four thousand, six hundred ninety-one".