42649279 has 2 divisors, whose sum is σ = 42649280. Its totient is φ = 42649278.

The previous prime is 42649247. The next prime is 42649283. The reversal of 42649279 is 97294624.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42649279 - 2⁵ = 42649247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42647279) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21324639 + 21324640.

It is an arithmetic number, because the mean of its divisors is an integer number (21324640).

Almost surely, 2^42649279 is an apocalyptic number.

42649279 is a deficient number, since it is larger than the sum of its proper divisors (1).

42649279 is an equidigital number, since it uses as much as digits as its factorization.

42649279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 43.

The square root of 42649279 is about 6530.6415458207. The cubic root of 42649279 is about 349.3847121765.

The spelling of 42649279 in words is "forty-two million, six hundred forty-nine thousand, two hundred seventy-nine".