387551061 has 20 divisors (see below), whose sum is σ = 594585772. Its totient is φ = 251382528.

The previous prime is 387551051. The next prime is 387551063. The reversal of 387551061 is 160155783.

387551061 is a `hidden beast` number, since 3 + 87 + 5 + 510 + 61 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 308002500 + 79548561 = 17550^2 + 8919^2 .

It is not a de Polignac number, because 387551061 - 2⁹ = 387550549 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 (387551063) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 61660 + ... + 67653.

Almost surely, 2^387551061 is an apocalyptic number.

It is an amenable number.

387551061 is a deficient number, since it is larger than the sum of its proper divisors (207034711).

387551061 is a wasteful number, since it uses less digits than its factorization.

387551061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129362 (or 129353 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

The square root of 387551061 is about 19686.3165930044. The cubic root of 387551061 is about 729.0818888857.

The spelling of 387551061 in words is "three hundred eighty-seven million, five hundred fifty-one thousand, sixty-one".