1917421734 has 16 divisors (see below), whose sum is σ = 3958548480. Its totient is φ = 618523080.

The previous prime is 1917421711. The next prime is 1917421763. The reversal of 1917421734 is 4371247191.

It is a super-2 number, since 2×1917421734² = 7353012212031133512, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1917421692 and 1917421701.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5154174 + ... + 5154545.

It is an arithmetic number, because the mean of its divisors is an integer number (247409280).

Almost surely, 2^1917421734 is an apocalyptic number.

1917421734 is an abundant number, since it is smaller than the sum of its proper divisors (2041126746).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1917421734 is a wasteful number, since it uses less digits than its factorization.

1917421734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10308755.

The product of its digits is 42336, while the sum is 39.

The square root of 1917421734 is about 43788.3744160479. The cubic root of 1917421734 is about 1242.3364148418.

The spelling of 1917421734 in words is "one billion, nine hundred seventeen million, four hundred twenty-one thousand, seven hundred thirty-four".