200672721 has 20 divisors (see below), whose sum is σ = 310110900. Its totient is φ = 129167136.

The previous prime is 200672713. The next prime is 200672761. The reversal of 200672721 is 127276002.

It can be written as a sum of positive squares in 2 ways, for example, as 37344321 + 163328400 = 6111^2 + 12780^2 .

It is not a de Polignac number, because 200672721 - 2³ = 200672713 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (200672761) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 40366 + ... + 45063.

It is an arithmetic number, because the mean of its divisors is an integer number (15505545).

Almost surely, 2^200672721 is an apocalyptic number.

It is an amenable number.

200672721 is a deficient number, since it is larger than the sum of its proper divisors (109438179).

200672721 is an equidigital number, since it uses as much as digits as its factorization.

200672721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85470 (or 85461 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 200672721 is about 14165.8999361142. The cubic root of 200672721 is about 585.4584965730.

The spelling of 200672721 in words is "two hundred million, six hundred seventy-two thousand, seven hundred twenty-one".