238471861 has 4 divisors (see below), whose sum is σ = 238673952. Its totient is φ = 238269772.

The previous prime is 238471859. The next prime is 238471879. The reversal of 238471861 is 168174832.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 238471861 - 2¹ = 238471859 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 (238471811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99265 + ... + 101638.

It is an arithmetic number, because the mean of its divisors is an integer number (59668488).

Almost surely, 2^238471861 is an apocalyptic number.

It is an amenable number.

238471861 is a deficient number, since it is larger than the sum of its proper divisors (202091).

238471861 is a wasteful number, since it uses less digits than its factorization.

238471861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202090.

The product of its digits is 64512, while the sum is 40.

The square root of 238471861 is about 15442.5341508445. The cubic root of 238471861 is about 620.1247243007.

The spelling of 238471861 in words is "two hundred thirty-eight million, four hundred seventy-one thousand, eight hundred sixty-one".