780007799 has 4 divisors (see below), whose sum is σ = 780375960. Its totient is φ = 779639640.

The previous prime is 780007783. The next prime is 780007829. The reversal of 780007799 is 997700087.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 780007799 - 2⁴ = 780007783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (780007729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 180884 + ... + 185145.

It is an arithmetic number, because the mean of its divisors is an integer number (195093990).

Almost surely, 2^780007799 is an apocalyptic number.

780007799 is a deficient number, since it is larger than the sum of its proper divisors (368161).

780007799 is a wasteful number, since it uses less digits than its factorization.

780007799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368160.

The product of its (nonzero) digits is 222264, while the sum is 47.

The square root of 780007799 is about 27928.6197116864. The cubic root of 780007799 is about 920.5194762360.

The spelling of 780007799 in words is "seven hundred eighty million, seven thousand, seven hundred ninety-nine".