914745721 has 2 divisors, whose sum is σ = 914745722. Its totient is φ = 914745720.

The previous prime is 914745703. The next prime is 914745743. The reversal of 914745721 is 127547419.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 882981225 + 31764496 = 29715^2 + 5636^2 .

It is a cyclic number.

It is not a de Polignac number, because 914745721 - 2¹¹ = 914743673 is a prime.

It is equal to p_46724773 and since 914745721 and 46724773 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (914745701) 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 as a sum of consecutive naturals, namely, 457372860 + 457372861.

It is an arithmetic number, because the mean of its divisors is an integer number (457372861).

Almost surely, 2^914745721 is an apocalyptic number.

It is an amenable number.

914745721 is a deficient number, since it is larger than the sum of its proper divisors (1).

914745721 is an equidigital number, since it uses as much as digits as its factorization.

914745721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 70560, while the sum is 40.

The square root of 914745721 is about 30244.7635302378. The cubic root of 914745721 is about 970.7337492104.

The spelling of 914745721 in words is "nine hundred fourteen million, seven hundred forty-five thousand, seven hundred twenty-one".