2172973619 has 2 divisors, whose sum is σ = 2172973620. Its totient is φ = 2172973618.

The previous prime is 2172973597. The next prime is 2172973657. The reversal of 2172973619 is 9163792712.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2172973619 is a prime.

It is a super-2 number, since 2×2172973619² = 9443628697739914322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2172973519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1086486809 + 1086486810.

It is an arithmetic number, because the mean of its divisors is an integer number (1086486810).

Almost surely, 2^2172973619 is an apocalyptic number.

2172973619 is a deficient number, since it is larger than the sum of its proper divisors (1).

2172973619 is an equidigital number, since it uses as much as digits as its factorization.

2172973619 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 285768, while the sum is 47.

The square root of 2172973619 is about 46615.1651182316. The cubic root of 2172973619 is about 1295.2436881341.

The spelling of 2172973619 in words is "two billion, one hundred seventy-two million, nine hundred seventy-three thousand, six hundred nineteen".