46665821 has 2 divisors, whose sum is σ = 46665822. Its totient is φ = 46665820.

The previous prime is 46665809. The next prime is 46665823. The reversal of 46665821 is 12856664.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46430596 + 235225 = 6814^2 + 485^2 .

It is a cyclic number.

It is not a de Polignac number, because 46665821 - 2¹⁰ = 46664797 is a prime.

Together with 46665823, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (46665823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23332910 + 23332911.

It is an arithmetic number, because the mean of its divisors is an integer number (23332911).

Almost surely, 2^46665821 is an apocalyptic number.

It is an amenable number.

46665821 is a deficient number, since it is larger than the sum of its proper divisors (1).

46665821 is an equidigital number, since it uses as much as digits as its factorization.

46665821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69120, while the sum is 38.

The square root of 46665821 is about 6831.2386138972. The cubic root of 46665821 is about 360.0252580015.

The spelling of 46665821 in words is "forty-six million, six hundred sixty-five thousand, eight hundred twenty-one".