42872099 has 2 divisors, whose sum is σ = 42872100. Its totient is φ = 42872098.

The previous prime is 42872083. The next prime is 42872117. The reversal of 42872099 is 99027824.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42872099 - 2⁴ = 42872083 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (42872009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21436049 + 21436050.

It is an arithmetic number, because the mean of its divisors is an integer number (21436050).

Almost surely, 2^42872099 is an apocalyptic number.

42872099 is a deficient number, since it is larger than the sum of its proper divisors (1).

42872099 is an equidigital number, since it uses as much as digits as its factorization.

42872099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 42872099 is about 6547.6789017178. The cubic root of 42872099 is about 349.9921059444.

It can be divided in two parts, 428 and 72099, that added together give a palindrome (72527).

The spelling of 42872099 in words is "forty-two million, eight hundred seventy-two thousand, ninety-nine".