386801993 has 2 divisors, whose sum is σ = 386801994. Its totient is φ = 386801992.

The previous prime is 386801983. The next prime is 386802007. The reversal of 386801993 is 399108683.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 239228089 + 147573904 = 15467^2 + 12148^2 .

It is a cyclic number.

It is not a de Polignac number, because 386801993 - 2⁶ = 386801929 is a prime.

It is not a weakly prime, because it can be changed into another prime (386801903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193400996 + 193400997.

It is an arithmetic number, because the mean of its divisors is an integer number (193400997).

Almost surely, 2^386801993 is an apocalyptic number.

It is an amenable number.

386801993 is a deficient number, since it is larger than the sum of its proper divisors (1).

386801993 is an equidigital number, since it uses as much as digits as its factorization.

386801993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 279936, while the sum is 47.

The square root of 386801993 is about 19667.2822982740. The cubic root of 386801993 is about 728.6118569298.

The spelling of 386801993 in words is "three hundred eighty-six million, eight hundred one thousand, nine hundred ninety-three".