40872869 has 2 divisors, whose sum is σ = 40872870. Its totient is φ = 40872868.

The previous prime is 40872851. The next prime is 40872883. The reversal of 40872869 is 96827804.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25623844 + 15249025 = 5062^2 + 3905^2 .

It is a cyclic number.

It is not a de Polignac number, because 40872869 - 2²⁴ = 24095653 is a prime.

It is a super-2 number, since 2×40872869² = 3341182840582322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40872889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20436434 + 20436435.

It is an arithmetic number, because the mean of its divisors is an integer number (20436435).

Almost surely, 2^40872869 is an apocalyptic number.

It is an amenable number.

40872869 is a deficient number, since it is larger than the sum of its proper divisors (1).

40872869 is an equidigital number, since it uses as much as digits as its factorization.

40872869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 193536, while the sum is 44.

The square root of 40872869 is about 6393.1892667119. The cubic root of 40872869 is about 344.4649523420.

The spelling of 40872869 in words is "forty million, eight hundred seventy-two thousand, eight hundred sixty-nine".