779091 has 4 divisors (see below), whose sum is σ = 1038792. Its totient is φ = 519392.

The previous prime is 779081. The next prime is 779101. The reversal of 779091 is 190977.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 190977 = 3 ⋅63659.

It is an interprime number because it is at equal distance from previous prime (779081) and next prime (779101).

It is a cyclic number.

It is not a de Polignac number, because 779091 - 2⁷ = 778963 is a prime.

It is a D-number.

779091 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (779011) 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, 129846 + ... + 129851.

It is an arithmetic number, because the mean of its divisors is an integer number (259698).

2⁷⁷⁹⁰⁹¹ is an apocalyptic number.

779091 is a deficient number, since it is larger than the sum of its proper divisors (259701).

779091 is a wasteful number, since it uses less digits than its factorization.

779091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259700.

The product of its (nonzero) digits is 3969, while the sum is 33.

The square root of 779091 is about 882.6613167008. The cubic root of 779091 is about 92.0158684033.

It can be divided in two parts, 77 and 9091, that multiplied together give a palindrome (700007).

The spelling of 779091 in words is "seven hundred seventy-nine thousand, ninety-one".