979805077 has 4 divisors (see below), whose sum is σ = 986381100. Its totient is φ = 973229056.

The previous prime is 979805063. The next prime is 979805087. The reversal of 979805077 is 770508979.

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 62078641 + 917726436 = 7879^2 + 30294^2 .

It is a cyclic number.

It is not a de Polignac number, because 979805077 - 2⁷ = 979804949 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 (979805087) 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, 3287788 + ... + 3288085.

It is an arithmetic number, because the mean of its divisors is an integer number (246595275).

Almost surely, 2^979805077 is an apocalyptic number.

It is an amenable number.

979805077 is a deficient number, since it is larger than the sum of its proper divisors (6576023).

979805077 is a wasteful number, since it uses less digits than its factorization.

979805077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6576022.

The product of its (nonzero) digits is 1111320, while the sum is 52.

The square root of 979805077 is about 31301.8382367554. The cubic root of 979805077 is about 993.2225286546. Note that the first 3 decimals are identical.

The spelling of 979805077 in words is "nine hundred seventy-nine million, eight hundred five thousand, seventy-seven".