1373172439 has 4 divisors (see below), whose sum is σ = 1373342256. Its totient is φ = 1373002624.

The previous prime is 1373172421. The next prime is 1373172457. The reversal of 1373172439 is 9342713731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9342713731 = 13 ⋅718670287.

It is an interprime number because it is at equal distance from previous prime (1373172421) and next prime (1373172457).

It is a cyclic number.

It is not a de Polignac number, because 1373172439 - 2⁹ = 1373171927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1373172469) 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, 72139 + ... + 89164.

It is an arithmetic number, because the mean of its divisors is an integer number (343335564).

Almost surely, 2^1373172439 is an apocalyptic number.

1373172439 is a deficient number, since it is larger than the sum of its proper divisors (169817).

1373172439 is an equidigital number, since it uses as much as digits as its factorization.

1373172439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169816.

The product of its digits is 95256, while the sum is 40.

The square root of 1373172439 is about 37056.3414141224. The cubic root of 1373172439 is about 1111.4971651213.

The spelling of 1373172439 in words is "one billion, three hundred seventy-three million, one hundred seventy-two thousand, four hundred thirty-nine".