1913299445 has 8 divisors (see below), whose sum is σ = 2296581336. Its totient is φ = 1530224896.

The previous prime is 1913299441. The next prime is 1913299463. The reversal of 1913299445 is 5449923191.

It can be written as a sum of positive squares in 4 ways, for example, as 7365796 + 1905933649 = 2714^2 + 43657^2 .

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 1913299445 - 2² = 1913299441 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 1913299445.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1913299441) 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, 30752 + ... + 69081.

It is an arithmetic number, because the mean of its divisors is an integer number (287072667).

Almost surely, 2^1913299445 is an apocalyptic number.

It is an amenable number.

1913299445 is a deficient number, since it is larger than the sum of its proper divisors (383281891).

1913299445 is an equidigital number, since it uses as much as digits as its factorization.

1913299445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103671.

The product of its digits is 349920, while the sum is 47.

The square root of 1913299445 is about 43741.2785021197. The cubic root of 1913299445 is about 1241.4454711803.

The spelling of 1913299445 in words is "one billion, nine hundred thirteen million, two hundred ninety-nine thousand, four hundred forty-five".