1973161 has 4 divisors (see below), whose sum is σ = 2001024. Its totient is φ = 1945300.

The previous prime is 1973149. The next prime is 1973177. The reversal of 1973161 is 1613791.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1613791 = 433 ⋅3727.

It is a cyclic number.

It is not a de Polignac number, because 1973161 - 2⁵ = 1973129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1973261) 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, 13825 + ... + 13966.

It is an arithmetic number, because the mean of its divisors is an integer number (500256).

2^1973161 is an apocalyptic number.

It is an amenable number.

1973161 is a deficient number, since it is larger than the sum of its proper divisors (27863).

1973161 is an equidigital number, since it uses as much as digits as its factorization.

1973161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27862.

The product of its digits is 1134, while the sum is 28.

The square root of 1973161 is about 1404.6924930390. The cubic root of 1973161 is about 125.4259813368.

The spelling of 1973161 in words is "one million, nine hundred seventy-three thousand, one hundred sixty-one".