335694721 has 2 divisors, whose sum is σ = 335694722. Its totient is φ = 335694720.

The previous prime is 335694677. The next prime is 335694761. The reversal of 335694721 is 127496533.

It is a happy number.

It is an a-pointer prime, because the next prime (335694761) can be obtained adding 335694721 to its sum of digits (40).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 245235600 + 90459121 = 15660^2 + 9511^2 .

It is an emirp because it is prime and its reverse (127496533) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 335694721 - 2¹¹ = 335692673 is a prime.

It is a super-2 number, since 2×335694721² = 225381891414535682, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (335694761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 167847360 + 167847361.

It is an arithmetic number, because the mean of its divisors is an integer number (167847361).

Almost surely, 2^335694721 is an apocalyptic number.

It is an amenable number.

335694721 is a deficient number, since it is larger than the sum of its proper divisors (1).

335694721 is an equidigital number, since it uses as much as digits as its factorization.

335694721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 136080, while the sum is 40.

The square root of 335694721 is about 18321.9737200990. The cubic root of 335694721 is about 694.9947179696.

The spelling of 335694721 in words is "three hundred thirty-five million, six hundred ninety-four thousand, seven hundred twenty-one".