238311997 has 16 divisors (see below), whose sum is σ = 301307904. Its totient is φ = 183078000.

The previous prime is 238311991. The next prime is 238312073. The reversal of 238311997 is 799113832.

It is not a de Polignac number, because 238311997 - 2¹¹ = 238309949 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 (238311991) 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, 16329 + ... + 27262.

It is an arithmetic number, because the mean of its divisors is an integer number (18831744).

Almost surely, 2^238311997 is an apocalyptic number.

It is an amenable number.

238311997 is a deficient number, since it is larger than the sum of its proper divisors (62995907).

238311997 is a wasteful number, since it uses less digits than its factorization.

238311997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43680.

The product of its digits is 81648, while the sum is 43.

The square root of 238311997 is about 15437.3571896228. The cubic root of 238311997 is about 619.9861226516.

The spelling of 238311997 in words is "two hundred thirty-eight million, three hundred eleven thousand, nine hundred ninety-seven".