356821849 has 2 divisors, whose sum is σ = 356821850. Its totient is φ = 356821848.

The previous prime is 356821819. The next prime is 356821921. The reversal of 356821849 is 948128653.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 216825625 + 139996224 = 14725^2 + 11832^2 .

It is an emirp because it is prime and its reverse (948128653) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 356821849 - 2¹³ = 356813657 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 356821799 and 356821808.

It is not a weakly prime, because it can be changed into another prime (356821819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 178410924 + 178410925.

It is an arithmetic number, because the mean of its divisors is an integer number (178410925).

Almost surely, 2^356821849 is an apocalyptic number.

It is an amenable number.

356821849 is a deficient number, since it is larger than the sum of its proper divisors (1).

356821849 is an equidigital number, since it uses as much as digits as its factorization.

356821849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 414720, while the sum is 46.

The square root of 356821849 is about 18889.7286640121. The cubic root of 356821849 is about 709.2790731588.

The spelling of 356821849 in words is "three hundred fifty-six million, eight hundred twenty-one thousand, eight hundred forty-nine".