285507973 has 2 divisors, whose sum is σ = 285507974. Its totient is φ = 285507972.

The previous prime is 285507967. The next prime is 285507977. The reversal of 285507973 is 379705582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 236605924 + 48902049 = 15382^2 + 6993^2 .

It is a cyclic number.

It is not a de Polignac number, because 285507973 - 2⁵ = 285507941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (285507977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142753986 + 142753987.

It is an arithmetic number, because the mean of its divisors is an integer number (142753987).

Almost surely, 2^285507973 is an apocalyptic number.

It is an amenable number.

285507973 is a deficient number, since it is larger than the sum of its proper divisors (1).

285507973 is an equidigital number, since it uses as much as digits as its factorization.

285507973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 529200, while the sum is 46.

The square root of 285507973 is about 16896.9811800807. The cubic root of 285507973 is about 658.4751858971.

The spelling of 285507973 in words is "two hundred eighty-five million, five hundred seven thousand, nine hundred seventy-three".