1722130491 has 4 divisors (see below), whose sum is σ = 2296173992. Its totient is φ = 1148086992.

The previous prime is 1722130483. The next prime is 1722130499. The reversal of 1722130491 is 1940312271.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1940312271 = 3 ⋅646770757.

It is an interprime number because it is at equal distance from previous prime (1722130483) and next prime (1722130499).

It is not a de Polignac number, because 1722130491 - 2³ = 1722130483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1722130499) 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, 287021746 + ... + 287021751.

It is an arithmetic number, because the mean of its divisors is an integer number (574043498).

Almost surely, 2^1722130491 is an apocalyptic number.

1722130491 is a deficient number, since it is larger than the sum of its proper divisors (574043501).

1722130491 is an equidigital number, since it uses as much as digits as its factorization.

1722130491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 574043500.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 1722130491 is about 41498.5601075507. The cubic root of 1722130491 is about 1198.6397761028.

The spelling of 1722130491 in words is "one billion, seven hundred twenty-two million, one hundred thirty thousand, four hundred ninety-one".