1336267721 has 2 divisors, whose sum is σ = 1336267722. Its totient is φ = 1336267720.

The previous prime is 1336267717. The next prime is 1336267753. The reversal of 1336267721 is 1277626331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1243338121 + 92929600 = 35261^2 + 9640^2 .

It is a cyclic number.

It is not a de Polignac number, because 1336267721 - 2² = 1336267717 is a prime.

It is a super-2 number, since 2×1336267721² = 3571222844373067682, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1336267781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 668133860 + 668133861.

It is an arithmetic number, because the mean of its divisors is an integer number (668133861).

Almost surely, 2^1336267721 is an apocalyptic number.

It is an amenable number.

1336267721 is a deficient number, since it is larger than the sum of its proper divisors (1).

1336267721 is an equidigital number, since it uses as much as digits as its factorization.

1336267721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 63504, while the sum is 38.

The square root of 1336267721 is about 36554.9958418819. The cubic root of 1336267721 is about 1101.4492525777.

The spelling of 1336267721 in words is "one billion, three hundred thirty-six million, two hundred sixty-seven thousand, seven hundred twenty-one".