1210985827 has 2 divisors, whose sum is σ = 1210985828. Its totient is φ = 1210985826.

The previous prime is 1210985819. The next prime is 1210985861. The reversal of 1210985827 is 7285890121.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (7285890121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1210985827 - 2³ = 1210985819 is a prime.

It is not a weakly prime, because it can be changed into another prime (1210985227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605492913 + 605492914.

It is an arithmetic number, because the mean of its divisors is an integer number (605492914).

Almost surely, 2^1210985827 is an apocalyptic number.

1210985827 is a deficient number, since it is larger than the sum of its proper divisors (1).

1210985827 is an equidigital number, since it uses as much as digits as its factorization.

1210985827 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80640, while the sum is 43.

The square root of 1210985827 is about 34799.2216435943. The cubic root of 1210985827 is about 1065.8915519989.

The spelling of 1210985827 in words is "one billion, two hundred ten million, nine hundred eighty-five thousand, eight hundred twenty-seven".