387438461 has 2 divisors, whose sum is σ = 387438462. Its totient is φ = 387438460.

The previous prime is 387438451. The next prime is 387438487. The reversal of 387438461 is 164834783.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 307335961 + 80102500 = 17531^2 + 8950^2 .

It is an emirp because it is prime and its reverse (164834783) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 387438461 - 2¹⁰ = 387437437 is a prime.

It is a super-2 number, since 2×387438461² = 300217122124097042, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (387438451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193719230 + 193719231.

It is an arithmetic number, because the mean of its divisors is an integer number (193719231).

Almost surely, 2^387438461 is an apocalyptic number.

It is an amenable number.

387438461 is a deficient number, since it is larger than the sum of its proper divisors (1).

387438461 is an equidigital number, since it uses as much as digits as its factorization.

387438461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 387072, while the sum is 44.

The square root of 387438461 is about 19683.4565308027. The cubic root of 387438461 is about 729.0112723219.

The spelling of 387438461 in words is "three hundred eighty-seven million, four hundred thirty-eight thousand, four hundred sixty-one".