1231367949 has 12 divisors (see below), whose sum is σ = 2032734496. Its totient is φ = 703638792.

The previous prime is 1231367947. The next prime is 1231367959. The reversal of 1231367949 is 9497631321.

It is not a de Polignac number, because 1231367949 - 2¹ = 1231367947 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 (1231367947) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9772699 + ... + 9772824.

Almost surely, 2^1231367949 is an apocalyptic number.

It is an amenable number.

1231367949 is a deficient number, since it is larger than the sum of its proper divisors (801366547).

1231367949 is a wasteful number, since it uses less digits than its factorization.

1231367949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19545536 (or 19545533 counting only the distinct ones).

The product of its digits is 244944, while the sum is 45.

The square root of 1231367949 is about 35090.8527824560. The cubic root of 1231367949 is about 1071.8383249743.

The spelling of 1231367949 in words is "one billion, two hundred thirty-one million, three hundred sixty-seven thousand, nine hundred forty-nine".