1473991 has 4 divisors (see below), whose sum is σ = 1509984. Its totient is φ = 1438000.

The previous prime is 1473977. The next prime is 1474003. The reversal of 1473991 is 1993741.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1993741 = 227 ⋅8783.

It is a cyclic number.

It is not a de Polignac number, because 1473991 - 2⁵ = 1473959 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1473961) 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, 17935 + ... + 18016.

It is an arithmetic number, because the mean of its divisors is an integer number (377496).

2^1473991 is an apocalyptic number.

1473991 is a deficient number, since it is larger than the sum of its proper divisors (35993).

1473991 is an equidigital number, since it uses as much as digits as its factorization.

1473991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35992.

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

The square root of 1473991 is about 1214.0803103584. The cubic root of 1473991 is about 113.8059435803.

The spelling of 1473991 in words is "one million, four hundred seventy-three thousand, nine hundred ninety-one".