40079491 has 2 divisors, whose sum is σ = 40079492. Its totient is φ = 40079490.

The previous prime is 40079449. The next prime is 40079513. The reversal of 40079491 is 19497004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40079491 - 2¹³ = 40071299 is a prime.

It is not a weakly prime, because it can be changed into another prime (40079441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20039745 + 20039746.

It is an arithmetic number, because the mean of its divisors is an integer number (20039746).

Almost surely, 2^40079491 is an apocalyptic number.

40079491 is a deficient number, since it is larger than the sum of its proper divisors (1).

40079491 is an equidigital number, since it uses as much as digits as its factorization.

40079491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 40079491 is about 6330.8365166066. The cubic root of 40079491 is about 342.2215855943.

The spelling of 40079491 in words is "forty million, seventy-nine thousand, four hundred ninety-one".