336717721 has 2 divisors, whose sum is σ = 336717722. Its totient is φ = 336717720.

The previous prime is 336717701. The next prime is 336717727. The reversal of 336717721 is 127717633.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 266342400 + 70375321 = 16320^2 + 8389^2 .

It is an emirp because it is prime and its reverse (127717633) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 336717721 - 2²¹ = 334620569 is a prime.

It is a super-2 number, since 2×336717721² = 226757647270867682, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (336717727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 168358860 + 168358861.

It is an arithmetic number, because the mean of its divisors is an integer number (168358861).

Almost surely, 2^336717721 is an apocalyptic number.

It is an amenable number.

336717721 is a deficient number, since it is larger than the sum of its proper divisors (1).

336717721 is an equidigital number, since it uses as much as digits as its factorization.

336717721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37044, while the sum is 37.

The square root of 336717721 is about 18349.8697815543. The cubic root of 336717721 is about 695.6999803767.

The spelling of 336717721 in words is "three hundred thirty-six million, seven hundred seventeen thousand, seven hundred twenty-one".