791409947 has 2 divisors, whose sum is σ = 791409948. Its totient is φ = 791409946.

The previous prime is 791409937. The next prime is 791409961. The reversal of 791409947 is 749904197.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 791409947 - 2¹⁸ = 791147803 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 791409895 and 791409904.

It is not a weakly prime, because it can be changed into another prime (791409937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 395704973 + 395704974.

It is an arithmetic number, because the mean of its divisors is an integer number (395704974).

Almost surely, 2^791409947 is an apocalyptic number.

791409947 is a deficient number, since it is larger than the sum of its proper divisors (1).

791409947 is an equidigital number, since it uses as much as digits as its factorization.

791409947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 571536, while the sum is 50.

The square root of 791409947 is about 28132.0092954627. The cubic root of 791409947 is about 924.9831784621.

The spelling of 791409947 in words is "seven hundred ninety-one million, four hundred nine thousand, nine hundred forty-seven".