85453409 has 2 divisors, whose sum is σ = 85453410. Its totient is φ = 85453408.

The previous prime is 85453369. The next prime is 85453421. The reversal of 85453409 is 90435458.

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., 73702225 + 11751184 = 8585^2 + 3428^2 .

It is a cyclic number.

It is not a de Polignac number, because 85453409 - 2⁸ = 85453153 is a prime.

It is not a weakly prime, because it can be changed into another prime (85453309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42726704 + 42726705.

It is an arithmetic number, because the mean of its divisors is an integer number (42726705).

Almost surely, 2^85453409 is an apocalyptic number.

It is an amenable number.

85453409 is a deficient number, since it is larger than the sum of its proper divisors (1).

85453409 is an equidigital number, since it uses as much as digits as its factorization.

85453409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 86400, while the sum is 38.

The square root of 85453409 is about 9244.1013084020. The cubic root of 85453409 is about 440.4633703178.

The spelling of 85453409 in words is "eighty-five million, four hundred fifty-three thousand, four hundred nine".