780493145 has 4 divisors (see below), whose sum is σ = 936591780. Its totient is φ = 624394512.

The previous prime is 780493127. The next prime is 780493157. The reversal of 780493145 is 541394087.

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

It can be written as a sum of positive squares in 2 ways, for example, as 366492736 + 414000409 = 19144^2 + 20347^2 .

It is a cyclic number.

It is not a de Polignac number, because 780493145 - 2¹⁰ = 780492121 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78049310 + ... + 78049319.

It is an arithmetic number, because the mean of its divisors is an integer number (234147945).

Almost surely, 2^780493145 is an apocalyptic number.

It is an amenable number.

780493145 is a deficient number, since it is larger than the sum of its proper divisors (156098635).

780493145 is a wasteful number, since it uses less digits than its factorization.

780493145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156098634.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 780493145 is about 27937.3074042578. The cubic root of 780493145 is about 920.7103622816.

The spelling of 780493145 in words is "seven hundred eighty million, four hundred ninety-three thousand, one hundred forty-five".