40105829 has 2 divisors, whose sum is σ = 40105830. Its totient is φ = 40105828.

The previous prime is 40105823. The next prime is 40105861. The reversal of 40105829 is 92850104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39715204 + 390625 = 6302^2 + 625^2 .

It is a cyclic number.

It is not a de Polignac number, because 40105829 - 2¹⁶ = 40040293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40105823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20052914 + 20052915.

It is an arithmetic number, because the mean of its divisors is an integer number (20052915).

Almost surely, 2^40105829 is an apocalyptic number.

It is an amenable number.

40105829 is a deficient number, since it is larger than the sum of its proper divisors (1).

40105829 is an equidigital number, since it uses as much as digits as its factorization.

40105829 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 40105829 is about 6332.9163108318. The cubic root of 40105829 is about 342.2965321421.

The spelling of 40105829 in words is "forty million, one hundred five thousand, eight hundred twenty-nine".