152838821 has 2 divisors, whose sum is σ = 152838822. Its totient is φ = 152838820.

The previous prime is 152838817. The next prime is 152838853. The reversal of 152838821 is 128838251.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127938721 + 24900100 = 11311^2 + 4990^2 .

It is a cyclic number.

It is not a de Polignac number, because 152838821 - 2² = 152838817 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (152838871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76419410 + 76419411.

It is an arithmetic number, because the mean of its divisors is an integer number (76419411).

Almost surely, 2^152838821 is an apocalyptic number.

It is an amenable number.

152838821 is a deficient number, since it is larger than the sum of its proper divisors (1).

152838821 is an equidigital number, since it uses as much as digits as its factorization.

152838821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30720, while the sum is 38.

The square root of 152838821 is about 12362.7998851393. The cubic root of 152838821 is about 534.6602448754.

The spelling of 152838821 in words is "one hundred fifty-two million, eight hundred thirty-eight thousand, eight hundred twenty-one".