161201699 has 2 divisors, whose sum is σ = 161201700. Its totient is φ = 161201698.

The previous prime is 161201693. The next prime is 161201707. The reversal of 161201699 is 996102161.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161201699 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (161201693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80600849 + 80600850.

It is an arithmetic number, because the mean of its divisors is an integer number (80600850).

Almost surely, 2^161201699 is an apocalyptic number.

161201699 is a deficient number, since it is larger than the sum of its proper divisors (1).

161201699 is an equidigital number, since it uses as much as digits as its factorization.

161201699 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 35.

The square root of 161201699 is about 12696.5231067407. The cubic root of 161201699 is about 544.2392651990.

The spelling of 161201699 in words is "one hundred sixty-one million, two hundred one thousand, six hundred ninety-nine".