662731231 has 2 divisors, whose sum is σ = 662731232. Its totient is φ = 662731230.

The previous prime is 662731207. The next prime is 662731241. The reversal of 662731231 is 132137266.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-662731231 is a prime.

It is a super-2 number, since 2×662731231² = 878425369085550722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 662731193 and 662731202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (662731241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331365615 + 331365616.

It is an arithmetic number, because the mean of its divisors is an integer number (331365616).

Almost surely, 2^662731231 is an apocalyptic number.

662731231 is a deficient number, since it is larger than the sum of its proper divisors (1).

662731231 is an equidigital number, since it uses as much as digits as its factorization.

662731231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 31.

The square root of 662731231 is about 25743.5667886173. The cubic root of 662731231 is about 871.8581113124.

Adding to 662731231 its reverse (132137266), we get a palindrome (794868497).

The spelling of 662731231 in words is "six hundred sixty-two million, seven hundred thirty-one thousand, two hundred thirty-one".