387917962469 has 2 divisors, whose sum is σ = 387917962470. Its totient is φ = 387917962468.

The previous prime is 387917962423. The next prime is 387917962493. The reversal of 387917962469 is 964269719783.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 195662021569 + 192255940900 = 442337^2 + 438470^2 .

It is a cyclic number.

It is not a de Polignac number, because 387917962469 - 2²⁰ = 387916913893 is a prime.

It is a super-2 number, since 2×387917962469² (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 (387917962969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193958981234 + 193958981235.

It is an arithmetic number, because the mean of its divisors is an integer number (193958981235).

Almost surely, 2^387917962469 is an apocalyptic number.

It is an amenable number.

387917962469 is a deficient number, since it is larger than the sum of its proper divisors (1).

387917962469 is an equidigital number, since it uses as much as digits as its factorization.

387917962469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 246903552, while the sum is 71.

The spelling of 387917962469 in words is "three hundred eighty-seven billion, nine hundred seventeen million, nine hundred sixty-two thousand, four hundred sixty-nine".