1436061821 has 2 divisors, whose sum is σ = 1436061822. Its totient is φ = 1436061820.

The previous prime is 1436061799. The next prime is 1436061839. The reversal of 1436061821 is 1281606341.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1394200921 + 41860900 = 37339^2 + 6470^2 .

It is an emirp because it is prime and its reverse (1281606341) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1436061821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1436061521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 718030910 + 718030911.

It is an arithmetic number, because the mean of its divisors is an integer number (718030911).

Almost surely, 2^1436061821 is an apocalyptic number.

It is an amenable number.

1436061821 is a deficient number, since it is larger than the sum of its proper divisors (1).

1436061821 is an equidigital number, since it uses as much as digits as its factorization.

1436061821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 1436061821 is about 37895.4063311109. The cubic root of 1436061821 is about 1128.2128591328.

The spelling of 1436061821 in words is "one billion, four hundred thirty-six million, sixty-one thousand, eight hundred twenty-one".