40191079 has 2 divisors, whose sum is σ = 40191080. Its totient is φ = 40191078.

The previous prime is 40191059. The next prime is 40191101. The reversal of 40191079 is 97019104.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40191079 - 2¹⁹ = 39666791 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40191079.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40191059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20095539 + 20095540.

It is an arithmetic number, because the mean of its divisors is an integer number (20095540).

Almost surely, 2^40191079 is an apocalyptic number.

40191079 is a deficient number, since it is larger than the sum of its proper divisors (1).

40191079 is an equidigital number, since it uses as much as digits as its factorization.

40191079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 31.

The square root of 40191079 is about 6339.6434442325. The cubic root of 40191079 is about 342.5388919907.

The spelling of 40191079 in words is "forty million, one hundred ninety-one thousand, seventy-nine".