1608214957 has 2 divisors, whose sum is σ = 1608214958. Its totient is φ = 1608214956.

The previous prime is 1608214913. The next prime is 1608214969. The reversal of 1608214957 is 7594128061.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1607929801 + 285156 = 40099^2 + 534^2 .

It is a cyclic number.

It is not a de Polignac number, because 1608214957 - 2¹¹ = 1608212909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1608214997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 804107478 + 804107479.

It is an arithmetic number, because the mean of its divisors is an integer number (804107479).

Almost surely, 2^1608214957 is an apocalyptic number.

It is an amenable number.

1608214957 is a deficient number, since it is larger than the sum of its proper divisors (1).

1608214957 is an equidigital number, since it uses as much as digits as its factorization.

1608214957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120960, while the sum is 43.

The square root of 1608214957 is about 40102.5554921379. Note that the first 3 decimals coincide. The cubic root of 1608214957 is about 1171.6054025078.

The spelling of 1608214957 in words is "one billion, six hundred eight million, two hundred fourteen thousand, nine hundred fifty-seven".