40079513 has 2 divisors, whose sum is σ = 40079514. Its totient is φ = 40079512.

The previous prime is 40079491. The next prime is 40079519. The reversal of 40079513 is 31597004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24334489 + 15745024 = 4933^2 + 3968^2 .

It is a cyclic number.

It is not a de Polignac number, because 40079513 - 2⁶ = 40079449 is a prime.

It is equal to p_2438174 and since 40079513 and 2438174 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (40079519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20039756 + 20039757.

It is an arithmetic number, because the mean of its divisors is an integer number (20039757).

Almost surely, 2^40079513 is an apocalyptic number.

It is an amenable number.

40079513 is a deficient number, since it is larger than the sum of its proper divisors (1).

40079513 is an equidigital number, since it uses as much as digits as its factorization.

40079513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 40079513 is about 6330.8382541335. The cubic root of 40079513 is about 342.2216482104.

The spelling of 40079513 in words is "forty million, seventy-nine thousand, five hundred thirteen".