1913664747 has 8 divisors (see below), whose sum is σ = 2560262544. Its totient is φ = 1271421728.

The previous prime is 1913664691. The next prime is 1913664757. The reversal of 1913664747 is 7474663191.

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 1913664747 - 2¹⁰ = 1913663723 is a prime.

It is a super-2 number, since 2×1913664747² = 7324225527821148018, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1913664696 and 1913664705.

It is not an unprimeable number, because it can be changed into a prime (1913664757) 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, 1087668 + ... + 1089425.

It is an arithmetic number, because the mean of its divisors is an integer number (320032818).

Almost surely, 2^1913664747 is an apocalyptic number.

1913664747 is a deficient number, since it is larger than the sum of its proper divisors (646597797).

1913664747 is a wasteful number, since it uses less digits than its factorization.

1913664747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2177389.

The product of its digits is 762048, while the sum is 48.

The square root of 1913664747 is about 43745.4540152460. The cubic root of 1913664747 is about 1241.5244749584.

The spelling of 1913664747 in words is "one billion, nine hundred thirteen million, six hundred sixty-four thousand, seven hundred forty-seven".