921386201 has 8 divisors (see below), whose sum is σ = 925015560. Its totient is φ = 917764992.

The previous prime is 921386183. The next prime is 921386227. The reversal of 921386201 is 102683129.

It can be written as a sum of positive squares in 4 ways, for example, as 119137225 + 802248976 = 10915^2 + 28324^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-921386201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (921386251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 310541 + ... + 313493.

It is an arithmetic number, because the mean of its divisors is an integer number (115626945).

It is the magic constant of a 1226 × 1226 magic square.

Almost surely, 2^921386201 is an apocalyptic number.

It is an amenable number.

921386201 is a deficient number, since it is larger than the sum of its proper divisors (3629359).

921386201 is a wasteful number, since it uses less digits than its factorization.

921386201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4075.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 921386201 is about 30354.3440219024. The cubic root of 921386201 is about 973.0770606532.

The spelling of 921386201 in words is "nine hundred twenty-one million, three hundred eighty-six thousand, two hundred one".