387242947 has 16 divisors (see below), whose sum is σ = 477146880. Its totient is φ = 306042912.

The previous prime is 387242941. The next prime is 387242969. The reversal of 387242947 is 749242783.

It is not a de Polignac number, because 387242947 - 2²³ = 378854339 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 387242897 and 387242906.

It is not an unprimeable number, because it can be changed into a prime (387242941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104004 + ... + 107662.

It is an arithmetic number, because the mean of its divisors is an integer number (29821680).

Almost surely, 2^387242947 is an apocalyptic number.

387242947 is a deficient number, since it is larger than the sum of its proper divisors (89903933).

387242947 is a wasteful number, since it uses less digits than its factorization.

387242947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4842.

The product of its digits is 677376, while the sum is 46.

The square root of 387242947 is about 19678.4894491422. The cubic root of 387242947 is about 728.8886241198. Note that the first 3 decimals are identical.

The spelling of 387242947 in words is "three hundred eighty-seven million, two hundred forty-two thousand, nine hundred forty-seven".