353665397 has 2 divisors, whose sum is σ = 353665398. Its totient is φ = 353665396.

The previous prime is 353665381. The next prime is 353665421. The reversal of 353665397 is 793566353.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 279257521 + 74407876 = 16711^2 + 8626^2 .

It is a cyclic number.

It is not a de Polignac number, because 353665397 - 2⁴ = 353665381 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (353667397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 176832698 + 176832699.

It is an arithmetic number, because the mean of its divisors is an integer number (176832699).

Almost surely, 2^353665397 is an apocalyptic number.

It is an amenable number.

353665397 is a deficient number, since it is larger than the sum of its proper divisors (1).

353665397 is an equidigital number, since it uses as much as digits as its factorization.

353665397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1530900, while the sum is 47.

The square root of 353665397 is about 18805.9936456439. The cubic root of 353665397 is about 707.1814442405.

The spelling of 353665397 in words is "three hundred fifty-three million, six hundred sixty-five thousand, three hundred ninety-seven".