919505913 has 4 divisors (see below), whose sum is σ = 1226007888. Its totient is φ = 613003940.

The previous prime is 919505879. The next prime is 919505921. The reversal of 919505913 is 319505919.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 919505913 - 2¹⁰ = 919504889 is a prime.

It is a super-2 number, since 2×919505913² = 1690982248083927138, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (919505933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153250983 + ... + 153250988.

It is an arithmetic number, because the mean of its divisors is an integer number (306501972).

Almost surely, 2^919505913 is an apocalyptic number.

It is an amenable number.

919505913 is a deficient number, since it is larger than the sum of its proper divisors (306501975).

919505913 is a wasteful number, since it uses less digits than its factorization.

919505913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306501974.

The product of its (nonzero) digits is 54675, while the sum is 42.

The square root of 919505913 is about 30323.3558993724. The cubic root of 919505913 is about 972.4146850788.

The spelling of 919505913 in words is "nine hundred nineteen million, five hundred five thousand, nine hundred thirteen".