1373204689 has 4 divisors (see below), whose sum is σ = 1445478640. Its totient is φ = 1300930740.

The previous prime is 1373204647. The next prime is 1373204771. The reversal of 1373204689 is 9864023731.

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: 9864023731 = 23 ⋅428870597.

It is a cyclic number.

It is not a de Polignac number, because 1373204689 - 2⁹ = 1373204177 is a prime.

It is a super-2 number, since 2×1373204689² = 3771382235783173442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1373204629) 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, 36136947 + ... + 36136984.

It is an arithmetic number, because the mean of its divisors is an integer number (361369660).

Almost surely, 2^1373204689 is an apocalyptic number.

1373204689 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1373204689 is a deficient number, since it is larger than the sum of its proper divisors (72273951).

1373204689 is an equidigital number, since it uses as much as digits as its factorization.

1373204689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72273950.

The product of its (nonzero) digits is 217728, while the sum is 43.

The square root of 1373204689 is about 37056.7765597603. The cubic root of 1373204689 is about 1111.5058665055.

The spelling of 1373204689 in words is "one billion, three hundred seventy-three million, two hundred four thousand, six hundred eighty-nine".