231849973 has 2 divisors, whose sum is σ = 231849974. Its totient is φ = 231849972.

The previous prime is 231849967. The next prime is 231849977. The reversal of 231849973 is 379948132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 221622769 + 10227204 = 14887^2 + 3198^2 .

It is a cyclic number.

It is not a de Polignac number, because 231849973 - 2²¹ = 229752821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231849977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115924986 + 115924987.

It is an arithmetic number, because the mean of its divisors is an integer number (115924987).

Almost surely, 2^231849973 is an apocalyptic number.

It is an amenable number.

231849973 is a deficient number, since it is larger than the sum of its proper divisors (1).

231849973 is an equidigital number, since it uses as much as digits as its factorization.

231849973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 46.

The square root of 231849973 is about 15226.6205377293. The cubic root of 231849973 is about 614.3308852899.

The spelling of 231849973 in words is "two hundred thirty-one million, eight hundred forty-nine thousand, nine hundred seventy-three".