387649573 has 2 divisors, whose sum is σ = 387649574. Its totient is φ = 387649572.

The previous prime is 387649531. The next prime is 387649607. The reversal of 387649573 is 375946783.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 305620324 + 82029249 = 17482^2 + 9057^2 .

It is an emirp because it is prime and its reverse (375946783) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 387649573 - 2²⁵ = 354095141 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 387649573.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (387649673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193824786 + 193824787.

It is an arithmetic number, because the mean of its divisors is an integer number (193824787).

Almost surely, 2^387649573 is an apocalyptic number.

It is an amenable number.

387649573 is a deficient number, since it is larger than the sum of its proper divisors (1).

387649573 is an equidigital number, since it uses as much as digits as its factorization.

387649573 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3810240, while the sum is 52.

The square root of 387649573 is about 19688.8184764856. The cubic root of 387649573 is about 729.1436590088.

The spelling of 387649573 in words is "three hundred eighty-seven million, six hundred forty-nine thousand, five hundred seventy-three".