917939049 has 16 divisors (see below), whose sum is σ = 1242353664. Its totient is φ = 602758800.

The previous prime is 917939027. The next prime is 917939053. The reversal of 917939049 is 940939719.

It is not a de Polignac number, because 917939049 - 2²⁰ = 916890473 is a prime.

It is a super-2 number, since 2×917939049² = 1685224195358048802, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 917938992 and 917939010.

It is not an unprimeable number, because it can be changed into a prime (917939069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 427272 + ... + 429414.

It is an arithmetic number, because the mean of its divisors is an integer number (77647104).

Almost surely, 2^917939049 is an apocalyptic number.

It is an amenable number.

917939049 is a deficient number, since it is larger than the sum of its proper divisors (324414615).

917939049 is a wasteful number, since it uses less digits than its factorization.

917939049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4228.

The product of its (nonzero) digits is 551124, while the sum is 51.

The square root of 917939049 is about 30297.5089570083. The cubic root of 917939049 is about 971.8620303670.

The spelling of 917939049 in words is "nine hundred seventeen million, nine hundred thirty-nine thousand, forty-nine".