387449493 has 4 divisors (see below), whose sum is σ = 516599328. Its totient is φ = 258299660.

The previous prime is 387449473. The next prime is 387449497. The reversal of 387449493 is 394944783.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 387449493 - 2²² = 383255189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (387449497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64574913 + ... + 64574918.

It is an arithmetic number, because the mean of its divisors is an integer number (129149832).

Almost surely, 2^387449493 is an apocalyptic number.

It is an amenable number.

387449493 is a deficient number, since it is larger than the sum of its proper divisors (129149835).

387449493 is a wasteful number, since it uses less digits than its factorization.

387449493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129149834.

The product of its digits is 2612736, while the sum is 51.

The square root of 387449493 is about 19683.7367641411. The cubic root of 387449493 is about 729.0181915937.

The spelling of 387449493 in words is "three hundred eighty-seven million, four hundred forty-nine thousand, four hundred ninety-three".