161663093 has 4 divisors (see below), whose sum is σ = 161723808. Its totient is φ = 161602380.

The previous prime is 161663083. The next prime is 161663107. The reversal of 161663093 is 390366161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161663093 is a prime.

It is a super-2 number, since 2×161663093² = 52269911276653298, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161663003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26171 + ... + 31752.

It is an arithmetic number, because the mean of its divisors is an integer number (40430952).

Almost surely, 2^161663093 is an apocalyptic number.

It is an amenable number.

161663093 is a deficient number, since it is larger than the sum of its proper divisors (60715).

161663093 is an equidigital number, since it uses as much as digits as its factorization.

161663093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60714.

The product of its (nonzero) digits is 17496, while the sum is 35.

The square root of 161663093 is about 12714.6802161910. The cubic root of 161663093 is about 544.7580139417.

The spelling of 161663093 in words is "one hundred sixty-one million, six hundred sixty-three thousand, ninety-three".