1421867653 has 2 divisors, whose sum is σ = 1421867654. Its totient is φ = 1421867652.

The previous prime is 1421867639. The next prime is 1421867761. The reversal of 1421867653 is 3567681241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1417296609 + 4571044 = 37647^2 + 2138^2 .

It is an emirp because it is prime and its reverse (3567681241) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1421867653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1421867053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710933826 + 710933827.

It is an arithmetic number, because the mean of its divisors is an integer number (710933827).

Almost surely, 2^1421867653 is an apocalyptic number.

It is an amenable number.

1421867653 is a deficient number, since it is larger than the sum of its proper divisors (1).

1421867653 is an equidigital number, since it uses as much as digits as its factorization.

1421867653 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 241920, while the sum is 43.

The square root of 1421867653 is about 37707.6604020987. The cubic root of 1421867653 is about 1124.4834245316.

The spelling of 1421867653 in words is "one billion, four hundred twenty-one million, eight hundred sixty-seven thousand, six hundred fifty-three".