42099977 has 2 divisors, whose sum is σ = 42099978. Its totient is φ = 42099976.

The previous prime is 42099971. The next prime is 42100001. The reversal of 42099977 is 77999024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37100281 + 4999696 = 6091^2 + 2236^2 .

It is a cyclic number.

It is not a de Polignac number, because 42099977 - 2⁴ = 42099961 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42099971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21049988 + 21049989.

It is an arithmetic number, because the mean of its divisors is an integer number (21049989).

Almost surely, 2^42099977 is an apocalyptic number.

It is an amenable number.

42099977 is a deficient number, since it is larger than the sum of its proper divisors (1).

42099977 is an equidigital number, since it uses as much as digits as its factorization.

42099977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 285768, while the sum is 47.

The square root of 42099977 is about 6488.4495066233. The cubic root of 42099977 is about 347.8782576091.

The spelling of 42099977 in words is "forty-two million, ninety-nine thousand, nine hundred seventy-seven".