387206397 has 12 divisors (see below), whose sum is σ = 559579644. Its totient is φ = 258007680.

The previous prime is 387206387. The next prime is 387206411. The reversal of 387206397 is 793602783.

It is a happy number.

387206397 is a `hidden beast` number, since 3 + 8 + 7 + 2 + 0 + 639 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 272052036 + 115154361 = 16494^2 + 10731^2 .

It is not a de Polignac number, because 387206397 - 2⁷ = 387206269 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (387206317) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10197 + ... + 29637.

It is an arithmetic number, because the mean of its divisors is an integer number (46631637).

Almost surely, 2^387206397 is an apocalyptic number.

It is an amenable number.

387206397 is a deficient number, since it is larger than the sum of its proper divisors (172373247).

387206397 is a wasteful number, since it uses less digits than its factorization.

387206397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21660 (or 21657 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 45.

The square root of 387206397 is about 19677.5607482228. The cubic root of 387206397 is about 728.8656913006.

The spelling of 387206397 in words is "three hundred eighty-seven million, two hundred six thousand, three hundred ninety-seven".