770868409 has 4 divisors (see below), whose sum is σ = 778815604. Its totient is φ = 762921216.

The previous prime is 770868403. The next prime is 770868419. The reversal of 770868409 is 904868077.

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 579461184 + 191407225 = 24072^2 + 13835^2 .

It is a cyclic number.

It is not a de Polignac number, because 770868409 - 2¹¹ = 770866361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (770868403) 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, 3973452 + ... + 3973645.

It is an arithmetic number, because the mean of its divisors is an integer number (194703901).

Almost surely, 2^770868409 is an apocalyptic number.

It is an amenable number.

770868409 is a deficient number, since it is larger than the sum of its proper divisors (7947195).

770868409 is an equidigital number, since it uses as much as digits as its factorization.

770868409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7947194.

The product of its (nonzero) digits is 677376, while the sum is 49.

The square root of 770868409 is about 27764.5170856617. The cubic root of 770868409 is about 916.9100847474.

The spelling of 770868409 in words is "seven hundred seventy million, eight hundred sixty-eight thousand, four hundred nine".