387693946 has 4 divisors (see below), whose sum is σ = 581540922. Its totient is φ = 193846972.

The previous prime is 387693893. The next prime is 387693947. The reversal of 387693946 is 649396783.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 649396783 = 7 ⋅92770969.

It can be written as a sum of positive squares in only one way, i.e., 283551921 + 104142025 = 16839^2 + 10205^2 .

It is not an unprimeable number, because it can be changed into a prime (387693947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 96923485 + ... + 96923488.

Almost surely, 2^387693946 is an apocalyptic number.

387693946 is a deficient number, since it is larger than the sum of its proper divisors (193846976).

387693946 is a wasteful number, since it uses less digits than its factorization.

387693946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193846975.

The product of its digits is 5878656, while the sum is 55.

The square root of 387693946 is about 19689.9453021079. The cubic root of 387693946 is about 729.1714788573.

The spelling of 387693946 in words is "three hundred eighty-seven million, six hundred ninety-three thousand, nine hundred forty-six".