1373317247 has 4 divisors (see below), whose sum is σ = 1374029640. Its totient is φ = 1372604856.

The previous prime is 1373317241. The next prime is 1373317249. The reversal of 1373317247 is 7427133731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7427133731 = 2887 ⋅2572613.

It is a cyclic number.

It is not a de Polignac number, because 1373317247 - 2²⁰ = 1372268671 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1373317247.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1373317241) 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, 353297 + ... + 357162.

It is an arithmetic number, because the mean of its divisors is an integer number (343507410).

Almost surely, 2^1373317247 is an apocalyptic number.

1373317247 is a deficient number, since it is larger than the sum of its proper divisors (712393).

1373317247 is an equidigital number, since it uses as much as digits as its factorization.

1373317247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 712392.

The product of its digits is 74088, while the sum is 38.

The square root of 1373317247 is about 37058.2952522104. The cubic root of 1373317247 is about 1111.5362347529.

The spelling of 1373317247 in words is "one billion, three hundred seventy-three million, three hundred seventeen thousand, two hundred forty-seven".