1231173049 has 8 divisors (see below), whose sum is σ = 1286792640. Its totient is φ = 1175727696.

The previous prime is 1231173019. The next prime is 1231173059. The reversal of 1231173049 is 9403711321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1231173049 - 2²³ = 1222784441 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1231173049.

It is not an unprimeable number, because it can be changed into a prime (1231173019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29002 + ... + 57475.

It is an arithmetic number, because the mean of its divisors is an integer number (160849080).

Almost surely, 2^1231173049 is an apocalyptic number.

It is an amenable number.

1231173049 is a deficient number, since it is larger than the sum of its proper divisors (55619591).

1231173049 is an equidigital number, since it uses as much as digits as its factorization.

1231173049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87119.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 1231173049 is about 35088.0755955638. The cubic root of 1231173049 is about 1071.7817720671.

The spelling of 1231173049 in words is "one billion, two hundred thirty-one million, one hundred seventy-three thousand, forty-nine".