161623307 has 2 divisors, whose sum is σ = 161623308. Its totient is φ = 161623306.

The previous prime is 161623249. The next prime is 161623309. The reversal of 161623307 is 703326161.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 161623307 - 2¹⁴ = 161606923 is a prime.

It is a super-2 number, since 2×161623307² = 52244186731232498, which contains 22 as substring.

Together with 161623309, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 161623307.

It is not a weakly prime, because it can be changed into another prime (161623309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80811653 + 80811654.

It is an arithmetic number, because the mean of its divisors is an integer number (80811654).

Almost surely, 2^161623307 is an apocalyptic number.

161623307 is a deficient number, since it is larger than the sum of its proper divisors (1).

161623307 is an equidigital number, since it uses as much as digits as its factorization.

161623307 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 161623307 is about 12713.1155504856. The cubic root of 161623307 is about 544.7133211587.

Adding to 161623307 its reverse (703326161), we get a palindrome (864949468).

The spelling of 161623307 in words is "one hundred sixty-one million, six hundred twenty-three thousand, three hundred seven".