231382973 has 2 divisors, whose sum is σ = 231382974. Its totient is φ = 231382972.

The previous prime is 231382933. The next prime is 231382997. The reversal of 231382973 is 379283132.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 160452889 + 70930084 = 12667^2 + 8422^2 .

It is a cyclic number.

It is not a de Polignac number, because 231382973 - 2²² = 227188669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231382913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115691486 + 115691487.

It is an arithmetic number, because the mean of its divisors is an integer number (115691487).

Almost surely, 2^231382973 is an apocalyptic number.

It is an amenable number.

231382973 is a deficient number, since it is larger than the sum of its proper divisors (1).

231382973 is an equidigital number, since it uses as much as digits as its factorization.

231382973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 38.

The square root of 231382973 is about 15211.2778227209. The cubic root of 231382973 is about 613.9181394118.

The spelling of 231382973 in words is "two hundred thirty-one million, three hundred eighty-two thousand, nine hundred seventy-three".