161051983 has 4 divisors (see below), whose sum is σ = 161513800. Its totient is φ = 160590168.

The previous prime is 161051981. The next prime is 161052011. The reversal of 161051983 is 389150161.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 161051983 - 2¹ = 161051981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161051981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 230385 + ... + 231082.

It is an arithmetic number, because the mean of its divisors is an integer number (40378450).

Almost surely, 2^161051983 is an apocalyptic number.

161051983 is a deficient number, since it is larger than the sum of its proper divisors (461817).

161051983 is an equidigital number, since it uses as much as digits as its factorization.

161051983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461816.

The product of its (nonzero) digits is 6480, while the sum is 34.

The square root of 161051983 is about 12690.6257922925. The cubic root of 161051983 is about 544.0707256931.

The spelling of 161051983 in words is "one hundred sixty-one million, fifty-one thousand, nine hundred eighty-three".