42779349 has 24 divisors (see below), whose sum is σ = 64426752. Its totient is φ = 27322560.

The previous prime is 42779329. The next prime is 42779351. The reversal of 42779349 is 94397724.

It is not a de Polignac number, because 42779349 - 2²¹ = 40682197 is a prime.

It is a super-3 number, since 3×42779349³ (a number of 24 digits) contains 333 as substring.

It is a Curzon number.

It is a nialpdrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42779309) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29137 + ... + 30569.

It is an arithmetic number, because the mean of its divisors is an integer number (2684448).

Almost surely, 2^42779349 is an apocalyptic number.

It is an amenable number.

42779349 is a deficient number, since it is larger than the sum of its proper divisors (21647403).

42779349 is a wasteful number, since it uses less digits than its factorization.

42779349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1577 (or 1574 counting only the distinct ones).

The product of its digits is 381024, while the sum is 45.

The square root of 42779349 is about 6540.5924043622. The cubic root of 42779349 is about 349.7395313784.

The spelling of 42779349 in words is "forty-two million, seven hundred seventy-nine thousand, three hundred forty-nine".