387412993 has 8 divisors (see below), whose sum is σ = 424206720. Its totient is φ = 350881680.

The previous prime is 387412979. The next prime is 387412997. The reversal of 387412993 is 399214783.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 387412993 - 2⁹ = 387412481 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (387412997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62505 + ... + 68422.

It is an arithmetic number, because the mean of its divisors is an integer number (53025840).

Almost surely, 2^387412993 is an apocalyptic number.

It is an amenable number.

387412993 is a deficient number, since it is larger than the sum of its proper divisors (36793727).

387412993 is a wasteful number, since it uses less digits than its factorization.

387412993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131207.

The product of its digits is 326592, while the sum is 46.

The square root of 387412993 is about 19682.8095809516. The cubic root of 387412993 is about 728.9952982875.

The spelling of 387412993 in words is "three hundred eighty-seven million, four hundred twelve thousand, nine hundred ninety-three".