780427213 has 4 divisors (see below), whose sum is σ = 786123900. Its totient is φ = 774730528.

The previous prime is 780427183. The next prime is 780427217. The reversal of 780427213 is 312724087.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 312724087 = 13 ⋅24055699.

It can be written as a sum of positive squares in 2 ways, for example, as 469892329 + 310534884 = 21677^2 + 17622^2 .

It is a cyclic number.

It is not a de Polignac number, because 780427213 - 2²¹ = 778330061 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 (780427217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2848138 + ... + 2848411.

It is an arithmetic number, because the mean of its divisors is an integer number (196530975).

Almost surely, 2^780427213 is an apocalyptic number.

It is an amenable number.

780427213 is a deficient number, since it is larger than the sum of its proper divisors (5696687).

780427213 is a wasteful number, since it uses less digits than its factorization.

780427213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5696686.

The product of its (nonzero) digits is 18816, while the sum is 34.

The square root of 780427213 is about 27936.1273801506. The cubic root of 780427213 is about 920.6844359445.

The spelling of 780427213 in words is "seven hundred eighty million, four hundred twenty-seven thousand, two hundred thirteen".