384290869 has 2 divisors, whose sum is σ = 384290870. Its totient is φ = 384290868.

The previous prime is 384290833. The next prime is 384290897. The reversal of 384290869 is 968092483.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 297148644 + 87142225 = 17238^2 + 9335^2 .

It is an emirp because it is prime and its reverse (968092483) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 384290869 - 2¹³ = 384282677 is a prime.

It is a super-2 number, since 2×384290869² = 295358943993550322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (384290369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192145434 + 192145435.

It is an arithmetic number, because the mean of its divisors is an integer number (192145435).

Almost surely, 2^384290869 is an apocalyptic number.

It is an amenable number.

384290869 is a deficient number, since it is larger than the sum of its proper divisors (1).

384290869 is an equidigital number, since it uses as much as digits as its factorization.

384290869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 746496, while the sum is 49.

The square root of 384290869 is about 19603.3382106212. The cubic root of 384290869 is about 727.0317130542.

The spelling of 384290869 in words is "three hundred eighty-four million, two hundred ninety thousand, eight hundred sixty-nine".