386091993 has 32 divisors (see below), whose sum is σ = 614741760. Its totient is φ = 210873600.

The previous prime is 386091991. The next prime is 386092001. The reversal of 386091993 is 399190683.

It is a happy number.

It is not a de Polignac number, because 386091993 - 2¹ = 386091991 is a prime.

It is not an unprimeable number, because it can be changed into a prime (386091991) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 58371 + ... + 64647.

It is an arithmetic number, because the mean of its divisors is an integer number (19210680).

Almost surely, 2^386091993 is an apocalyptic number.

It is an amenable number.

386091993 is a deficient number, since it is larger than the sum of its proper divisors (228649767).

386091993 is a wasteful number, since it uses less digits than its factorization.

386091993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6417.

The product of its (nonzero) digits is 314928, while the sum is 48.

The square root of 386091993 is about 19649.2237251246. The cubic root of 386091993 is about 728.1657792016.

The spelling of 386091993 in words is "three hundred eighty-six million, ninety-one thousand, nine hundred ninety-three".