161203897939 has 8 divisors (see below), whose sum is σ = 193929501440. Its totient is φ = 130902413256.

The previous prime is 161203897931. The next prime is 161203897951. The reversal of 161203897939 is 939798302161.

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 161203897939 - 2³ = 161203897931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161203897931) 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, 606029559 + ... + 606029824.

It is an arithmetic number, because the mean of its divisors is an integer number (24241187680).

Almost surely, 2^161203897939 is an apocalyptic number.

161203897939 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

161203897939 is a deficient number, since it is larger than the sum of its proper divisors (32725603501).

161203897939 is a wasteful number, since it uses less digits than its factorization.

161203897939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1212059409.

The product of its (nonzero) digits is 4408992, while the sum is 58.

The spelling of 161203897939 in words is "one hundred sixty-one billion, two hundred three million, eight hundred ninety-seven thousand, nine hundred thirty-nine".