387931258469 has 2 divisors, whose sum is σ = 387931258470. Its totient is φ = 387931258468.

The previous prime is 387931258433. The next prime is 387931258493. The reversal of 387931258469 is 964852139783.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 291497409025 + 96433849444 = 539905^2 + 310538^2 .

It is a cyclic number.

It is not a de Polignac number, because 387931258469 - 2⁸ = 387931258213 is a prime.

It is a super-2 number, since 2×387931258469² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (387931258669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193965629234 + 193965629235.

It is an arithmetic number, because the mean of its divisors is an integer number (193965629235).

Almost surely, 2^387931258469 is an apocalyptic number.

It is an amenable number.

387931258469 is a deficient number, since it is larger than the sum of its proper divisors (1).

387931258469 is an equidigital number, since it uses as much as digits as its factorization.

387931258469 is an evil number, because the sum of its binary digits is even.

The product of its digits is 78382080, while the sum is 65.

The spelling of 387931258469 in words is "three hundred eighty-seven billion, nine hundred thirty-one million, two hundred fifty-eight thousand, four hundred sixty-nine".