355978901 has 2 divisors, whose sum is σ = 355978902. Its totient is φ = 355978900.

The previous prime is 355978873. The next prime is 355978951. The reversal of 355978901 is 109879553.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 343546225 + 12432676 = 18535^2 + 3526^2 .

It is a cyclic number.

It is not a de Polignac number, because 355978901 - 2⁶ = 355978837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (355978951) 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, 177989450 + 177989451.

It is an arithmetic number, because the mean of its divisors is an integer number (177989451).

Almost surely, 2^355978901 is an apocalyptic number.

It is an amenable number.

355978901 is a deficient number, since it is larger than the sum of its proper divisors (1).

355978901 is an equidigital number, since it uses as much as digits as its factorization.

355978901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 340200, while the sum is 47.

The square root of 355978901 is about 18867.4031334468. The cubic root of 355978901 is about 708.7201043932.

The spelling of 355978901 in words is "three hundred fifty-five million, nine hundred seventy-eight thousand, nine hundred one".