285121948357 has 2 divisors, whose sum is σ = 285121948358. Its totient is φ = 285121948356.

The previous prime is 285121948291. The next prime is 285121948369. The reversal of 285121948357 is 753849121582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 273284290756 + 11837657601 = 522766^2 + 108801^2 .

It is a cyclic number.

It is not a de Polignac number, because 285121948357 - 2⁷ = 285121948229 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 285121948298 and 285121948307.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (285121948387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142560974178 + 142560974179.

It is an arithmetic number, because the mean of its divisors is an integer number (142560974179).

Almost surely, 2^285121948357 is an apocalyptic number.

It is an amenable number.

285121948357 is a deficient number, since it is larger than the sum of its proper divisors (1).

285121948357 is an equidigital number, since it uses as much as digits as its factorization.

285121948357 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4838400, while the sum is 55.

The spelling of 285121948357 in words is "two hundred eighty-five billion, one hundred twenty-one million, nine hundred forty-eight thousand, three hundred fifty-seven".