355405397 has 2 divisors, whose sum is σ = 355405398. Its totient is φ = 355405396.

The previous prime is 355405357. The next prime is 355405403. The reversal of 355405397 is 793504553.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 353665636 + 1739761 = 18806^2 + 1319^2 .

It is a cyclic number.

It is not a de Polignac number, because 355405397 - 2²⁸ = 86969941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (355405307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 177702698 + 177702699.

It is an arithmetic number, because the mean of its divisors is an integer number (177702699).

Almost surely, 2^355405397 is an apocalyptic number.

It is an amenable number.

355405397 is a deficient number, since it is larger than the sum of its proper divisors (1).

355405397 is an equidigital number, since it uses as much as digits as its factorization.

355405397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 283500, while the sum is 41.

The square root of 355405397 is about 18852.1987311825. The cubic root of 355405397 is about 708.3393025318.

The spelling of 355405397 in words is "three hundred fifty-five million, four hundred five thousand, three hundred ninety-seven".