1572273823 has 4 divisors (see below), whose sum is σ = 1573552288. Its totient is φ = 1570995360.

The previous prime is 1572273809. The next prime is 1572273827. The reversal of 1572273823 is 3283722751.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1572273823 is a prime.

It is a super-4 number, since 4×1572273823⁴ (a number of 38 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1572273827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 637386 + ... + 639847.

It is an arithmetic number, because the mean of its divisors is an integer number (393388072).

Almost surely, 2^1572273823 is an apocalyptic number.

1572273823 is a deficient number, since it is larger than the sum of its proper divisors (1278465).

1572273823 is a wasteful number, since it uses less digits than its factorization.

1572273823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1278464.

The product of its digits is 141120, while the sum is 40.

The square root of 1572273823 is about 39651.9081886358. The cubic root of 1572273823 is about 1162.8117045670.

The spelling of 1572273823 in words is "one billion, five hundred seventy-two million, two hundred seventy-three thousand, eight hundred twenty-three".