916675021 has 2 divisors, whose sum is σ = 916675022. Its totient is φ = 916675020.

The previous prime is 916675009. The next prime is 916675033. The reversal of 916675021 is 120576619.

It is a balanced prime because it is at equal distance from previous prime (916675009) and next prime (916675033).

It can be written as a sum of positive squares in only one way, i.e., 559842921 + 356832100 = 23661^2 + 18890^2 .

It is an emirp because it is prime and its reverse (120576619) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 916675021 - 2⁹ = 916674509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (916675061) 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, 458337510 + 458337511.

It is an arithmetic number, because the mean of its divisors is an integer number (458337511).

Almost surely, 2^916675021 is an apocalyptic number.

It is an amenable number.

916675021 is a deficient number, since it is larger than the sum of its proper divisors (1).

916675021 is an equidigital number, since it uses as much as digits as its factorization.

916675021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 916675021 is about 30276.6415079348. The cubic root of 916675021 is about 971.4157316261.

The spelling of 916675021 in words is "nine hundred sixteen million, six hundred seventy-five thousand, twenty-one".