40158869 has 2 divisors, whose sum is σ = 40158870. Its totient is φ = 40158868.

The previous prime is 40158841. The next prime is 40158889. The reversal of 40158869 is 96885104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38626225 + 1532644 = 6215^2 + 1238^2 .

It is a cyclic number.

It is not a de Polignac number, because 40158869 - 2¹² = 40154773 is a prime.

It is a super-2 number, since 2×40158869² = 3225469518718322, 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 (40158889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20079434 + 20079435.

It is an arithmetic number, because the mean of its divisors is an integer number (20079435).

Almost surely, 2^40158869 is an apocalyptic number.

It is an amenable number.

40158869 is a deficient number, since it is larger than the sum of its proper divisors (1).

40158869 is an equidigital number, since it uses as much as digits as its factorization.

40158869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69120, while the sum is 41.

The square root of 40158869 is about 6337.1025713649. The cubic root of 40158869 is about 342.4473615093.

The spelling of 40158869 in words is "forty million, one hundred fifty-eight thousand, eight hundred sixty-nine".