285764641 has 2 divisors, whose sum is σ = 285764642. Its totient is φ = 285764640.

The previous prime is 285764621. The next prime is 285764657. The reversal of 285764641 is 146467582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 265559616 + 20205025 = 16296^2 + 4495^2 .

It is a cyclic number.

It is not a de Polignac number, because 285764641 - 2⁷ = 285764513 is a prime.

It is a super-2 number, since 2×285764641² = 163322860091717762, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (285764621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142882320 + 142882321.

It is an arithmetic number, because the mean of its divisors is an integer number (142882321).

Almost surely, 2^285764641 is an apocalyptic number.

It is an amenable number.

285764641 is a deficient number, since it is larger than the sum of its proper divisors (1).

285764641 is an equidigital number, since it uses as much as digits as its factorization.

285764641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 322560, while the sum is 43.

The square root of 285764641 is about 16904.5745583851. The cubic root of 285764641 is about 658.6724470415.

The spelling of 285764641 in words is "two hundred eighty-five million, seven hundred sixty-four thousand, six hundred forty-one".