426869779 has 32 divisors (see below), whose sum is σ = 529943040. Its totient is φ = 335549952.

The previous prime is 426869753. The next prime is 426869803. The reversal of 426869779 is 977968624.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-426869779 is a prime.

It is a super-3 number, since 3×426869779³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (426869279) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1144237 + ... + 1144609.

It is an arithmetic number, because the mean of its divisors is an integer number (16560720).

Almost surely, 2^426869779 is an apocalyptic number.

426869779 is a deficient number, since it is larger than the sum of its proper divisors (103073261).

426869779 is a wasteful number, since it uses less digits than its factorization.

426869779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 619.

The product of its digits is 9144576, while the sum is 58.

The square root of 426869779 is about 20660.8271615635. The cubic root of 426869779 is about 752.9482641685.

It can be divided in two parts, 4268 and 69779, that added together give a palindrome (74047).

The spelling of 426869779 in words is "four hundred twenty-six million, eight hundred sixty-nine thousand, seven hundred seventy-nine".