389508694469 has 2 divisors, whose sum is σ = 389508694470. Its totient is φ = 389508694468.

The previous prime is 389508694451. The next prime is 389508694517. The reversal of 389508694469 is 964496805983.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 362931543844 + 26577150625 = 602438^2 + 163025^2 .

It is a cyclic number.

It is not a de Polignac number, because 389508694469 - 2³⁶ = 320789217733 is a prime.

It is a super-2 number, since 2×389508694469² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (389508694769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194754347234 + 194754347235.

It is an arithmetic number, because the mean of its divisors is an integer number (194754347235).

Almost surely, 2^389508694469 is an apocalyptic number.

It is an amenable number.

389508694469 is a deficient number, since it is larger than the sum of its proper divisors (1).

389508694469 is an equidigital number, since it uses as much as digits as its factorization.

389508694469 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 403107840, while the sum is 71.

The spelling of 389508694469 in words is "three hundred eighty-nine billion, five hundred eight million, six hundred ninety-four thousand, four hundred sixty-nine".