1293893989 has 8 divisors (see below), whose sum is σ = 1318351680. Its totient is φ = 1269609600.

The previous prime is 1293893981. The next prime is 1293894001. The reversal of 1293893989 is 9893983921.

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 1293893989 - 2³ = 1293893981 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 (1293893981) 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, 28204 + ... + 58165.

It is an arithmetic number, because the mean of its divisors is an integer number (164793960).

Almost surely, 2^1293893989 is an apocalyptic number.

It is an amenable number.

1293893989 is a deficient number, since it is larger than the sum of its proper divisors (24457691).

1293893989 is an equidigital number, since it uses as much as digits as its factorization.

1293893989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86651.

The product of its digits is 7558272, while the sum is 61.

The square root of 1293893989 is about 35970.7379546208. The cubic root of 1293893989 is about 1089.6814682406.

The spelling of 1293893989 in words is "one billion, two hundred ninety-three million, eight hundred ninety-three thousand, nine hundred eighty-nine".