355120813 has 2 divisors, whose sum is σ = 355120814. Its totient is φ = 355120812.

The previous prime is 355120763. The next prime is 355120817. The reversal of 355120813 is 318021553.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 352012644 + 3108169 = 18762^2 + 1763^2 .

It is a cyclic number.

It is not a de Polignac number, because 355120813 - 2²¹ = 353023661 is a prime.

It is a super-2 number, since 2×355120813² = 252221583651561938, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (355120817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 177560406 + 177560407.

It is an arithmetic number, because the mean of its divisors is an integer number (177560407).

Almost surely, 2^355120813 is an apocalyptic number.

It is an amenable number.

355120813 is a deficient number, since it is larger than the sum of its proper divisors (1).

355120813 is an equidigital number, since it uses as much as digits as its factorization.

355120813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 355120813 is about 18844.6494528288. The cubic root of 355120813 is about 708.1501890461.

The spelling of 355120813 in words is "three hundred fifty-five million, one hundred twenty thousand, eight hundred thirteen".