1611699697 has 2 divisors, whose sum is σ = 1611699698. Its totient is φ = 1611699696.

The previous prime is 1611699667. The next prime is 1611699779. The reversal of 1611699697 is 7969961161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1609694641 + 2005056 = 40121^2 + 1416^2 .

It is a cyclic number.

It is not a de Polignac number, because 1611699697 - 2¹⁹ = 1611175409 is a prime.

It is not a weakly prime, because it can be changed into another prime (1611699667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 805849848 + 805849849.

It is an arithmetic number, because the mean of its divisors is an integer number (805849849).

Almost surely, 2^1611699697 is an apocalyptic number.

It is an amenable number.

1611699697 is a deficient number, since it is larger than the sum of its proper divisors (1).

1611699697 is an equidigital number, since it uses as much as digits as its factorization.

1611699697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1102248, while the sum is 55.

The square root of 1611699697 is about 40145.9798360932. The cubic root of 1611699697 is about 1172.4510180892.

The spelling of 1611699697 in words is "one billion, six hundred eleven million, six hundred ninety-nine thousand, six hundred ninety-seven".