426781749 has 16 divisors (see below), whose sum is σ = 572890752. Its totient is φ = 282604608.

The previous prime is 426781727. The next prime is 426781783. The reversal of 426781749 is 947187624.

It is not a de Polignac number, because 426781749 - 2⁹ = 426781237 is a prime.

It is a super-2 number, since 2×426781749² = 364285322558998002, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 426781698 and 426781707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (426781799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 348352 + ... + 349574.

It is an arithmetic number, because the mean of its divisors is an integer number (35805672).

Almost surely, 2^426781749 is an apocalyptic number.

It is an amenable number.

426781749 is a deficient number, since it is larger than the sum of its proper divisors (146109003).

426781749 is a wasteful number, since it uses less digits than its factorization.

426781749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1916.

The product of its digits is 677376, while the sum is 48.

The square root of 426781749 is about 20658.6966917083. The cubic root of 426781749 is about 752.8965024090.

The spelling of 426781749 in words is "four hundred twenty-six million, seven hundred eighty-one thousand, seven hundred forty-nine".