1913872426 has 8 divisors (see below), whose sum is σ = 2871440100. Its totient is φ = 956725728.

The previous prime is 1913872421. The next prime is 1913872447. The reversal of 1913872426 is 6242783191.

It can be written as a sum of positive squares in 2 ways, for example, as 1726319401 + 187553025 = 41549^2 + 13695^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1913872421) 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, 93621 + ... + 112216.

Almost surely, 2^1913872426 is an apocalyptic number.

1913872426 is a deficient number, since it is larger than the sum of its proper divisors (957567674).

1913872426 is a wasteful number, since it uses less digits than its factorization.

1913872426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210488.

The product of its digits is 145152, while the sum is 43.

The square root of 1913872426 is about 43747.8276717827. The cubic root of 1913872426 is about 1241.5693851645.

The spelling of 1913872426 in words is "one billion, nine hundred thirteen million, eight hundred seventy-two thousand, four hundred twenty-six".