161020983 has 8 divisors (see below), whose sum is σ = 216701568. Its totient is φ = 106343864.

The previous prime is 161020973. The next prime is 161021023. The reversal of 161020983 is 389020161.

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

It is a cyclic number.

It is not a de Polignac number, because 161020983 - 2⁹ = 161020471 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 161020983.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161020903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 250491 + ... + 251132.

It is an arithmetic number, because the mean of its divisors is an integer number (27087696).

Almost surely, 2^161020983 is an apocalyptic number.

161020983 is a deficient number, since it is larger than the sum of its proper divisors (55680585).

161020983 is a wasteful number, since it uses less digits than its factorization.

161020983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501733.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 161020983 is about 12689.4043595434. The cubic root of 161020983 is about 544.0358150710.

The spelling of 161020983 in words is "one hundred sixty-one million, twenty thousand, nine hundred eighty-three".