355640387 has 2 divisors, whose sum is σ = 355640388. Its totient is φ = 355640386.

The previous prime is 355640381. The next prime is 355640419. The reversal of 355640387 is 783046553.

It is a weak prime.

It is an emirp because it is prime and its reverse (783046553) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 355640387 - 2⁴ = 355640371 is a prime.

It is not a weakly prime, because it can be changed into another prime (355640381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 177820193 + 177820194.

It is an arithmetic number, because the mean of its divisors is an integer number (177820194).

Almost surely, 2^355640387 is an apocalyptic number.

355640387 is a deficient number, since it is larger than the sum of its proper divisors (1).

355640387 is an equidigital number, since it uses as much as digits as its factorization.

355640387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 302400, while the sum is 41.

The square root of 355640387 is about 18858.4301308460. The cubic root of 355640387 is about 708.4953834299.

The spelling of 355640387 in words is "three hundred fifty-five million, six hundred forty thousand, three hundred eighty-seven".