1136947621 has 2 divisors, whose sum is σ = 1136947622. Its totient is φ = 1136947620.

The previous prime is 1136947619. The next prime is 1136947687. The reversal of 1136947621 is 1267496311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1042644100 + 94303521 = 32290^2 + 9711^2 .

It is an emirp because it is prime and its reverse (1267496311) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1136947621 - 2¹ = 1136947619 is a prime.

Together with 1136947619, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1136947121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 568473810 + 568473811.

It is an arithmetic number, because the mean of its divisors is an integer number (568473811).

Almost surely, 2^1136947621 is an apocalyptic number.

It is an amenable number.

1136947621 is a deficient number, since it is larger than the sum of its proper divisors (1).

1136947621 is an equidigital number, since it uses as much as digits as its factorization.

1136947621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 40.

The square root of 1136947621 is about 33718.6539025507. The cubic root of 1136947621 is about 1043.7107398861.

The spelling of 1136947621 in words is "one billion, one hundred thirty-six million, nine hundred forty-seven thousand, six hundred twenty-one".