1372328817 has 4 divisors (see below), whose sum is σ = 1829771760. Its totient is φ = 914885876.

The previous prime is 1372328777. The next prime is 1372328819. The reversal of 1372328817 is 7188232731.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7188232731 = 3 ⋅2396077577.

It is a cyclic number.

It is not a de Polignac number, because 1372328817 - 2¹⁰ = 1372327793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1372328819) 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, 228721467 + ... + 228721472.

It is an arithmetic number, because the mean of its divisors is an integer number (457442940).

Almost surely, 2^1372328817 is an apocalyptic number.

It is an amenable number.

1372328817 is a deficient number, since it is larger than the sum of its proper divisors (457442943).

1372328817 is an equidigital number, since it uses as much as digits as its factorization.

1372328817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457442942.

The product of its digits is 112896, while the sum is 42.

The square root of 1372328817 is about 37044.9567012839. The cubic root of 1372328817 is about 1111.2694987517.

The spelling of 1372328817 in words is "one billion, three hundred seventy-two million, three hundred twenty-eight thousand, eight hundred seventeen".