387649741 has 2 divisors, whose sum is σ = 387649742. Its totient is φ = 387649740.

The previous prime is 387649729. The next prime is 387649747. The reversal of 387649741 is 147946783.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 370716516 + 16933225 = 19254^2 + 4115^2 .

It is an emirp because it is prime and its reverse (147946783) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 387649741 - 2¹¹ = 387647693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (387649747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193824870 + 193824871.

It is an arithmetic number, because the mean of its divisors is an integer number (193824871).

Almost surely, 2^387649741 is an apocalyptic number.

It is an amenable number.

387649741 is a deficient number, since it is larger than the sum of its proper divisors (1).

387649741 is an equidigital number, since it uses as much as digits as its factorization.

387649741 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1016064, while the sum is 49.

The square root of 387649741 is about 19688.8227428661. The cubic root of 387649741 is about 729.1437643412.

The spelling of 387649741 in words is "three hundred eighty-seven million, six hundred forty-nine thousand, seven hundred forty-one".