1002137861 has 2 divisors, whose sum is σ = 1002137862. Its totient is φ = 1002137860.

The previous prime is 1002137839. The next prime is 1002137909. The reversal of 1002137861 is 1687312001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 992565025 + 9572836 = 31505^2 + 3094^2 .

It is an emirp because it is prime and its reverse (1687312001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1002137861 - 2⁶ = 1002137797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1002133861) 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 as a sum of consecutive naturals, namely, 501068930 + 501068931.

It is an arithmetic number, because the mean of its divisors is an integer number (501068931).

Almost surely, 2^1002137861 is an apocalyptic number.

It is an amenable number.

1002137861 is a deficient number, since it is larger than the sum of its proper divisors (1).

1002137861 is an equidigital number, since it uses as much as digits as its factorization.

1002137861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 1002137861 is about 31656.5611050853. The cubic root of 1002137861 is about 1000.7121131079.

Adding to 1002137861 its reverse (1687312001), we get a palindrome (2689449862).

The spelling of 1002137861 in words is "one billion, two million, one hundred thirty-seven thousand, eight hundred sixty-one".