1336221749 has 2 divisors, whose sum is σ = 1336221750. Its totient is φ = 1336221748.

The previous prime is 1336221707. The next prime is 1336221751. The reversal of 1336221749 is 9471226331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 826275025 + 509946724 = 28745^2 + 22582^2 .

It is a cyclic number.

It is not a de Polignac number, because 1336221749 - 2¹² = 1336217653 is a prime.

Together with 1336221751, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1336221769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 668110874 + 668110875.

It is an arithmetic number, because the mean of its divisors is an integer number (668110875).

Almost surely, 2^1336221749 is an apocalyptic number.

It is an amenable number.

1336221749 is a deficient number, since it is larger than the sum of its proper divisors (1).

1336221749 is an equidigital number, since it uses as much as digits as its factorization.

1336221749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 38.

The square root of 1336221749 is about 36554.3670304931. The cubic root of 1336221749 is about 1101.4366212751.

The spelling of 1336221749 in words is "one billion, three hundred thirty-six million, two hundred twenty-one thousand, seven hundred forty-nine".