42779901 has 16 divisors (see below), whose sum is σ = 59232960. Its totient is φ = 27431040.

The previous prime is 42779861. The next prime is 42779903. The reversal of 42779901 is 10997724.

It is not a de Polignac number, because 42779901 - 2¹⁰ = 42778877 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42779901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42779903) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26446 + ... + 28016.

It is an arithmetic number, because the mean of its divisors is an integer number (3702060).

Almost surely, 2^42779901 is an apocalyptic number.

It is an amenable number.

42779901 is a deficient number, since it is larger than the sum of its proper divisors (16453059).

42779901 is a wasteful number, since it uses less digits than its factorization.

42779901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1916.

The product of its (nonzero) digits is 31752, while the sum is 39.

The square root of 42779901 is about 6540.6346022385. The cubic root of 42779901 is about 349.7410356509.

The spelling of 42779901 in words is "forty-two million, seven hundred seventy-nine thousand, nine hundred one".