387920943 has 18 divisors (see below), whose sum is σ = 595233704. Its totient is φ = 243399744.

The previous prime is 387920941. The next prime is 387920959. The reversal of 387920943 is 349029783.

It is a happy number.

It is not a de Polignac number, because 387920943 - 2¹ = 387920941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (387920941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 71971 + ... + 77172.

Almost surely, 2^387920943 is an apocalyptic number.

387920943 is a deficient number, since it is larger than the sum of its proper divisors (207312761).

387920943 is a wasteful number, since it uses less digits than its factorization.

387920943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149183 (or 149163 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The square root of 387920943 is about 19695.7087458157. The cubic root of 387920943 is about 729.3137624345.

The spelling of 387920943 in words is "three hundred eighty-seven million, nine hundred twenty thousand, nine hundred forty-three".