780008797 has 2 divisors, whose sum is σ = 780008798. Its totient is φ = 780008796.

The previous prime is 780008783. The next prime is 780008839. The reversal of 780008797 is 797800087.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 692005636 + 88003161 = 26306^2 + 9381^2 .

It is a cyclic number.

It is not a de Polignac number, because 780008797 - 2²³ = 771620189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (780000797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 390004398 + 390004399.

It is an arithmetic number, because the mean of its divisors is an integer number (390004399).

Almost surely, 2^780008797 is an apocalyptic number.

It is an amenable number.

780008797 is a deficient number, since it is larger than the sum of its proper divisors (1).

780008797 is an equidigital number, since it uses as much as digits as its factorization.

780008797 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 197568, while the sum is 46.

The square root of 780008797 is about 27928.6375786575. The cubic root of 780008797 is about 920.5198688295.

The spelling of 780008797 in words is "seven hundred eighty million, eight thousand, seven hundred ninety-seven".