780077449 has 4 divisors (see below), whose sum is σ = 791720464. Its totient is φ = 768434436.

The previous prime is 780077443. The next prime is 780077461. The reversal of 780077449 is 944770087.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 780077449 - 2⁷ = 780077321 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 780077399 and 780077408.

It is not an unprimeable number, because it can be changed into a prime (780077443) 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, 5821407 + ... + 5821540.

It is an arithmetic number, because the mean of its divisors is an integer number (197930116).

Almost surely, 2^780077449 is an apocalyptic number.

It is an amenable number.

780077449 is a deficient number, since it is larger than the sum of its proper divisors (11643015).

780077449 is a wasteful number, since it uses less digits than its factorization.

780077449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11643014.

The product of its (nonzero) digits is 395136, while the sum is 46.

The square root of 780077449 is about 27929.8666126425. The cubic root of 780077449 is about 920.5468743694.

The spelling of 780077449 in words is "seven hundred eighty million, seventy-seven thousand, four hundred forty-nine".