146949821 has 2 divisors, whose sum is σ = 146949822. Its totient is φ = 146949820.

The previous prime is 146949811. The next prime is 146949893. The reversal of 146949821 is 128949641.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 113656921 + 33292900 = 10661^2 + 5770^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-146949821 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (146949811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73474910 + 73474911.

It is an arithmetic number, because the mean of its divisors is an integer number (73474911).

Almost surely, 2^146949821 is an apocalyptic number.

It is an amenable number.

146949821 is a deficient number, since it is larger than the sum of its proper divisors (1).

146949821 is an equidigital number, since it uses as much as digits as its factorization.

146949821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 124416, while the sum is 44.

The square root of 146949821 is about 12122.2861292745. The cubic root of 146949821 is about 527.7031506409.

The spelling of 146949821 in words is "one hundred forty-six million, nine hundred forty-nine thousand, eight hundred twenty-one".