42872293 has 2 divisors, whose sum is σ = 42872294. Its totient is φ = 42872292.

The previous prime is 42872281. The next prime is 42872309. The reversal of 42872293 is 39227824.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42797764 + 74529 = 6542^2 + 273^2 .

It is a cyclic number.

It is not a de Polignac number, because 42872293 - 2⁵ = 42872261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42873293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21436146 + 21436147.

It is an arithmetic number, because the mean of its divisors is an integer number (21436147).

Almost surely, 2^42872293 is an apocalyptic number.

It is an amenable number.

42872293 is a deficient number, since it is larger than the sum of its proper divisors (1).

42872293 is an equidigital number, since it uses as much as digits as its factorization.

42872293 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 37.

The square root of 42872293 is about 6547.6937161110. The cubic root of 42872293 is about 349.9926338586.

The spelling of 42872293 in words is "forty-two million, eight hundred seventy-two thousand, two hundred ninety-three".