161797942 has 16 divisors (see below), whose sum is σ = 261331920. Its totient is φ = 74848768.

The previous prime is 161797927. The next prime is 161797957. The reversal of 161797942 is 249797161.

It is an interprime number because it is at equal distance from previous prime (161797927) and next prime (161797957).

It is a junction number, because it is equal to n+sod(n) for n = 161797892 and 161797901.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38323 + ... + 42334.

It is an arithmetic number, because the mean of its divisors is an integer number (16333245).

Almost surely, 2^161797942 is an apocalyptic number.

161797942 is a deficient number, since it is larger than the sum of its proper divisors (99533978).

161797942 is a wasteful number, since it uses less digits than its factorization.

161797942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80735.

The product of its digits is 190512, while the sum is 46.

The square root of 161797942 is about 12719.9819968426. The cubic root of 161797942 is about 544.9094392635.

The spelling of 161797942 in words is "one hundred sixty-one million, seven hundred ninety-seven thousand, nine hundred forty-two".