231148969 has 2 divisors, whose sum is σ = 231148970. Its totient is φ = 231148968.

The previous prime is 231148921. The next prime is 231148979. The reversal of 231148969 is 969841132.

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., 163712025 + 67436944 = 12795^2 + 8212^2 .

It is a cyclic number.

It is not a de Polignac number, because 231148969 - 2¹¹ = 231146921 is a prime.

It is a super-2 number, since 2×231148969² = 106859691739525922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (231148909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115574484 + 115574485.

It is an arithmetic number, because the mean of its divisors is an integer number (115574485).

Almost surely, 2^231148969 is an apocalyptic number.

It is an amenable number.

231148969 is a deficient number, since it is larger than the sum of its proper divisors (1).

231148969 is an equidigital number, since it uses as much as digits as its factorization.

231148969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 93312, while the sum is 43.

The square root of 231148969 is about 15203.5840840244. The cubic root of 231148969 is about 613.7111121407.

The spelling of 231148969 in words is "two hundred thirty-one million, one hundred forty-eight thousand, nine hundred sixty-nine".