2161797 has 16 divisors (see below), whose sum is σ = 3178560. Its totient is φ = 1296000.

The previous prime is 2161787. The next prime is 2161813. The reversal of 2161797 is 7971612.

It is not a de Polignac number, because 2161797 - 2⁴ = 2161781 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

2161797 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2161777) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3297 + ... + 3897.

It is an arithmetic number, because the mean of its divisors is an integer number (198660).

2^2161797 is an apocalyptic number.

It is an amenable number.

2161797 is a deficient number, since it is larger than the sum of its proper divisors (1016763).

2161797 is a wasteful number, since it uses less digits than its factorization.

2161797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 724.

The product of its digits is 5292, while the sum is 33.

The square root of 2161797 is about 1470.3050703851. The cubic root of 2161797 is about 129.3019188649.

The spelling of 2161797 in words is "two million, one hundred sixty-one thousand, seven hundred ninety-seven".