1972319723 has 16 divisors (see below), whose sum is σ = 2182952832. Its totient is φ = 1781821800.

The previous prime is 1972319717. The next prime is 1972319729. The reversal of 1972319723 is 3279132791.

It is an interprime number because it is at equal distance from previous prime (1972319717) and next prime (1972319729).

It is not a de Polignac number, because 1972319723 - 2¹² = 1972315627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1972319729) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 212408 + ... + 221498.

It is an arithmetic number, because the mean of its divisors is an integer number (136434552).

Almost surely, 2^1972319723 is an apocalyptic number.

1972319723 is a deficient number, since it is larger than the sum of its proper divisors (210633109).

1972319723 is an equidigital number, since it uses as much as digits as its factorization.

1972319723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9287 (or 9265 counting only the distinct ones).

The product of its digits is 142884, while the sum is 44.

The square root of 1972319723 is about 44410.8063763765. The cubic root of 1972319723 is about 1254.0815326079.

The spelling of 1972319723 in words is "one billion, nine hundred seventy-two million, three hundred nineteen thousand, seven hundred twenty-three".