1971493 has 4 divisors (see below), whose sum is σ = 1981600. Its totient is φ = 1961388.

The previous prime is 1971481. The next prime is 1971503. The reversal of 1971493 is 3941791.

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: 3941791 = 7 ⋅563113.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1971493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1971433) 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, 4755 + ... + 5152.

It is an arithmetic number, because the mean of its divisors is an integer number (495400).

2^1971493 is an apocalyptic number.

It is an amenable number.

1971493 is a deficient number, since it is larger than the sum of its proper divisors (10107).

1971493 is an equidigital number, since it uses as much as digits as its factorization.

1971493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10106.

The product of its digits is 6804, while the sum is 34.

The square root of 1971493 is about 1404.0986432584. The cubic root of 1971493 is about 125.3906286690.

The spelling of 1971493 in words is "one million, nine hundred seventy-one thousand, four hundred ninety-three".