1916730729 has 16 divisors (see below), whose sum is σ = 2842444800. Its totient is φ = 1276540848.

The previous prime is 1916730709. The next prime is 1916730733. The reversal of 1916730729 is 9270376191.

It is not a de Polignac number, because 1916730729 - 2⁷ = 1916730601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1916730709) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7689 + ... + 62390.

It is an arithmetic number, because the mean of its divisors is an integer number (177652800).

Almost surely, 2^1916730729 is an apocalyptic number.

It is an amenable number.

1916730729 is a deficient number, since it is larger than the sum of its proper divisors (925714071).

1916730729 is a wasteful number, since it uses less digits than its factorization.

1916730729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71101 (or 71095 counting only the distinct ones).

The product of its (nonzero) digits is 142884, while the sum is 45.

The square root of 1916730729 is about 43780.4834258371. The cubic root of 1916730729 is about 1242.1871581943.

It can be divided in two parts, 19167307 and 29, that added together give a triangular number (19167336 = T₆₁₉₁).

The spelling of 1916730729 in words is "one billion, nine hundred sixteen million, seven hundred thirty thousand, seven hundred twenty-nine".