85440133 has 2 divisors, whose sum is σ = 85440134. Its totient is φ = 85440132.

The previous prime is 85440127. The next prime is 85440137. The reversal of 85440133 is 33104458.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85248289 + 191844 = 9233^2 + 438^2 .

It is a cyclic number.

It is not a de Polignac number, because 85440133 - 2⁹ = 85439621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85440137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42720066 + 42720067.

It is an arithmetic number, because the mean of its divisors is an integer number (42720067).

Almost surely, 2^85440133 is an apocalyptic number.

It is an amenable number.

85440133 is a deficient number, since it is larger than the sum of its proper divisors (1).

85440133 is an equidigital number, since it uses as much as digits as its factorization.

85440133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 85440133 is about 9243.3832009714. The cubic root of 85440133 is about 440.4405590783.

The spelling of 85440133 in words is "eighty-five million, four hundred forty thousand, one hundred thirty-three".