1212527993 has 4 divisors (see below), whose sum is σ = 1227136848. Its totient is φ = 1197919140.

The previous prime is 1212527971. The next prime is 1212528001. The reversal of 1212527993 is 3997252121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3997252121 = 967 ⋅4133663.

It is a cyclic number.

It is not a de Polignac number, because 1212527993 - 2¹⁰ = 1212526969 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 1212527993.

It is not an unprimeable number, because it can be changed into a prime (1212527923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7304303 + ... + 7304468.

It is an arithmetic number, because the mean of its divisors is an integer number (306784212).

Almost surely, 2^1212527993 is an apocalyptic number.

It is an amenable number.

1212527993 is a deficient number, since it is larger than the sum of its proper divisors (14608855).

1212527993 is an equidigital number, since it uses as much as digits as its factorization.

1212527993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14608854.

The product of its digits is 68040, while the sum is 41.

The square root of 1212527993 is about 34821.3726466950. The cubic root of 1212527993 is about 1066.3438238569.

The spelling of 1212527993 in words is "one billion, two hundred twelve million, five hundred twenty-seven thousand, nine hundred ninety-three".