655390937 has 2 divisors, whose sum is σ = 655390938. Its totient is φ = 655390936.

The previous prime is 655390909. The next prime is 655390963. The reversal of 655390937 is 739093556.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 620059801 + 35331136 = 24901^2 + 5944^2 .

It is a cyclic number.

It is not a de Polignac number, because 655390937 - 2¹⁴ = 655374553 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 655390891 and 655390900.

It is not a weakly prime, because it can be changed into another prime (655390537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327695468 + 327695469.

It is an arithmetic number, because the mean of its divisors is an integer number (327695469).

Almost surely, 2^655390937 is an apocalyptic number.

It is an amenable number.

655390937 is a deficient number, since it is larger than the sum of its proper divisors (1).

655390937 is an equidigital number, since it uses as much as digits as its factorization.

655390937 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 765450, while the sum is 47.

The square root of 655390937 is about 25600.6042311505. The cubic root of 655390937 is about 868.6273050539.

The spelling of 655390937 in words is "six hundred fifty-five million, three hundred ninety thousand, nine hundred thirty-seven".