161748789 has 8 divisors (see below), whose sum is σ = 216461952. Its totient is φ = 107434080.

The previous prime is 161748781. The next prime is 161748791. The reversal of 161748789 is 987847161.

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

It is not a de Polignac number, because 161748789 - 2³ = 161748781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161748781) 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 7 ways as a sum of consecutive naturals, for example, 98664 + ... + 100289.

It is an arithmetic number, because the mean of its divisors is an integer number (27057744).

Almost surely, 2^161748789 is an apocalyptic number.

It is an amenable number.

161748789 is a deficient number, since it is larger than the sum of its proper divisors (54713163).

161748789 is a wasteful number, since it uses less digits than its factorization.

161748789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199227.

The product of its digits is 677376, while the sum is 51.

The square root of 161748789 is about 12718.0497325651. The cubic root of 161748789 is about 544.8542538760.

The spelling of 161748789 in words is "one hundred sixty-one million, seven hundred forty-eight thousand, seven hundred eighty-nine".