336721901 has 4 divisors (see below), whose sum is σ = 337587900. Its totient is φ = 335855904.

The previous prime is 336721897. The next prime is 336721919. The reversal of 336721901 is 109127633.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 76545001 + 260176900 = 8749^2 + 16130^2 .

It is a cyclic number.

It is not a de Polignac number, because 336721901 - 2² = 336721897 is a prime.

It is a super-2 number, since 2×336721901² = 226763277226107602, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (336721921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 432416 + ... + 433193.

It is an arithmetic number, because the mean of its divisors is an integer number (84396975).

Almost surely, 2^336721901 is an apocalyptic number.

It is an amenable number.

336721901 is a deficient number, since it is larger than the sum of its proper divisors (865999).

336721901 is an equidigital number, since it uses as much as digits as its factorization.

336721901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 865998.

The product of its (nonzero) digits is 6804, while the sum is 32.

The square root of 336721901 is about 18349.9836784669. The cubic root of 336721901 is about 695.7028591618.

The spelling of 336721901 in words is "three hundred thirty-six million, seven hundred twenty-one thousand, nine hundred one".