1372823217 has 6 divisors (see below), whose sum is σ = 1982966882. Its totient is φ = 915215472.

The previous prime is 1372823197. The next prime is 1372823267. The reversal of 1372823217 is 7123282731.

It can be written as a sum of positive squares in only one way, i.e., 1210413681 + 162409536 = 34791^2 + 12744^2 .

It is not a de Polignac number, because 1372823217 - 2⁸ = 1372822961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1372823267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 76267948 + ... + 76267965.

Almost surely, 2^1372823217 is an apocalyptic number.

It is an amenable number.

1372823217 is a deficient number, since it is larger than the sum of its proper divisors (610143665).

1372823217 is a wasteful number, since it uses less digits than its factorization.

1372823217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152535919 (or 152535916 counting only the distinct ones).

The product of its digits is 28224, while the sum is 36.

The square root of 1372823217 is about 37051.6290734969. The cubic root of 1372823217 is about 1111.4029326802.

The spelling of 1372823217 in words is "one billion, three hundred seventy-two million, eight hundred twenty-three thousand, two hundred seventeen".