42779073 has 8 divisors (see below), whose sum is σ = 57175936. Its totient is φ = 28450800.

The previous prime is 42779063. The next prime is 42779083. The reversal of 42779073 is 37097724.

It is an interprime number because it is at equal distance from previous prime (42779063) and next prime (42779083).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42779073 - 2¹⁴ = 42762689 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42779063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15673 + ... + 18198.

It is an arithmetic number, because the mean of its divisors is an integer number (7146992).

Almost surely, 2^42779073 is an apocalyptic number.

It is an amenable number.

42779073 is a deficient number, since it is larger than the sum of its proper divisors (14396863).

42779073 is a wasteful number, since it uses less digits than its factorization.

42779073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34295.

The product of its (nonzero) digits is 74088, while the sum is 39.

The square root of 42779073 is about 6540.5713053219. The cubic root of 42779073 is about 349.7387792373.

The spelling of 42779073 in words is "forty-two million, seven hundred seventy-nine thousand, seventy-three".