1002012149 has 2 divisors, whose sum is σ = 1002012150. Its totient is φ = 1002012148.

The previous prime is 1002012131. The next prime is 1002012211. The reversal of 1002012149 is 9412102001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 989102500 + 12909649 = 31450^2 + 3593^2 .

It is an emirp because it is prime and its reverse (9412102001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1002012149 - 2⁸ = 1002011893 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1002012149.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1002012449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501006074 + 501006075.

It is an arithmetic number, because the mean of its divisors is an integer number (501006075).

Almost surely, 2^1002012149 is an apocalyptic number.

It is an amenable number.

1002012149 is a deficient number, since it is larger than the sum of its proper divisors (1).

1002012149 is an equidigital number, since it uses as much as digits as its factorization.

1002012149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 1002012149 is about 31654.5754828587. The cubic root of 1002012149 is about 1000.6702669751.

The spelling of 1002012149 in words is "one billion, two million, twelve thousand, one hundred forty-nine".