1923971 has 4 divisors (see below), whose sum is σ = 2198832. Its totient is φ = 1649112.

The previous prime is 1923917. The next prime is 1923979. The reversal of 1923971 is 1793291.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1793291 = 197 ⋅9103.

It is a cyclic number.

It is not a de Polignac number, because 1923971 - 2¹⁸ = 1661827 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1923979) 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, 137420 + ... + 137433.

It is an arithmetic number, because the mean of its divisors is an integer number (549708).

2^1923971 is an apocalyptic number.

1923971 is a deficient number, since it is larger than the sum of its proper divisors (274861).

1923971 is an equidigital number, since it uses as much as digits as its factorization.

1923971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274860.

The product of its digits is 3402, while the sum is 32.

The square root of 1923971 is about 1387.0728171224. The cubic root of 1923971 is about 124.3749274850.

The spelling of 1923971 in words is "one million, nine hundred twenty-three thousand, nine hundred seventy-one".