161623301 has 8 divisors (see below), whose sum is σ = 195577920. Its totient is φ = 130385088.

The previous prime is 161623249. The next prime is 161623307. The reversal of 161623301 is 103326161.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161623301 is a prime.

It is a super-2 number, since 2×161623301² = 52244182852273202, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161623307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 678971 + ... + 679208.

It is an arithmetic number, because the mean of its divisors is an integer number (24447240).

Almost surely, 2^161623301 is an apocalyptic number.

It is an amenable number.

161623301 is a deficient number, since it is larger than the sum of its proper divisors (33954619).

161623301 is a wasteful number, since it uses less digits than its factorization.

161623301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1358203.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 161623301 is about 12713.1153145089. The cubic root of 161623301 is about 544.7133144182.

Adding to 161623301 its reverse (103326161), we get a palindrome (264949462).

The spelling of 161623301 in words is "one hundred sixty-one million, six hundred twenty-three thousand, three hundred one".