842979775 has 18 divisors (see below), whose sum is σ = 1148964656. Its totient is φ = 613074000.

The previous prime is 842979763. The next prime is 842979779. The reversal of 842979775 is 577979248.

It is not a de Polignac number, because 842979775 - 2¹³ = 842971583 is a prime.

It is a super-2 number, since 2×842979775² = 1421229802118101250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (842979779) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 136311 + ... + 142360.

Almost surely, 2^842979775 is an apocalyptic number.

842979775 is a deficient number, since it is larger than the sum of its proper divisors (305984881).

842979775 is a wasteful number, since it uses less digits than its factorization.

842979775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278703 (or 278687 counting only the distinct ones).

The product of its digits is 8890560, while the sum is 58.

The square root of 842979775 is about 29034.1139868259. The cubic root of 842979775 is about 944.6531672354.

The spelling of 842979775 in words is "eight hundred forty-two million, nine hundred seventy-nine thousand, seven hundred seventy-five".