1247677913 has 8 divisors (see below), whose sum is σ = 1252475136. Its totient is φ = 1242889200.

The previous prime is 1247677909. The next prime is 1247677927. The reversal of 1247677913 is 3197767421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1247677913 - 2² = 1247677909 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1247677943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 480248 + ... + 482838.

It is an arithmetic number, because the mean of its divisors is an integer number (156559392).

Almost surely, 2^1247677913 is an apocalyptic number.

It is an amenable number.

1247677913 is a deficient number, since it is larger than the sum of its proper divisors (4797223).

1247677913 is a wasteful number, since it uses less digits than its factorization.

1247677913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4255.

The product of its digits is 444528, while the sum is 47.

The square root of 1247677913 is about 35322.4845247330. The cubic root of 1247677913 is about 1076.5498935723.

The spelling of 1247677913 in words is "one billion, two hundred forty-seven million, six hundred seventy-seven thousand, nine hundred thirteen".