1217290093 has 4 divisors (see below), whose sum is σ = 1222514748. Its totient is φ = 1212065440.

The previous prime is 1217290079. The next prime is 1217290159. The reversal of 1217290093 is 3900927121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 396925929 + 820364164 = 19923^2 + 28642^2 .

It is a cyclic number.

It is not a de Polignac number, because 1217290093 - 2²¹ = 1215192941 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 (1217290493) 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 in 3 ways as a sum of consecutive naturals, for example, 2611978 + ... + 2612443.

It is an arithmetic number, because the mean of its divisors is an integer number (305628687).

Almost surely, 2^1217290093 is an apocalyptic number.

It is an amenable number.

1217290093 is a deficient number, since it is larger than the sum of its proper divisors (5224655).

1217290093 is an equidigital number, since it uses as much as digits as its factorization.

1217290093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5224654.

The product of its (nonzero) digits is 6804, while the sum is 34.

The square root of 1217290093 is about 34889.6846216758. The cubic root of 1217290093 is about 1067.7379916808.

The spelling of 1217290093 in words is "one billion, two hundred seventeen million, two hundred ninety thousand, ninety-three".