77726965 has 4 divisors (see below), whose sum is σ = 93272364. Its totient is φ = 62181568.

The previous prime is 77726963. The next prime is 77726983. The reversal of 77726965 is 56962777.

It is a happy number.

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 43784689 + 33942276 = 6617^2 + 5826^2 .

It is a cyclic number.

It is not a de Polignac number, because 77726965 - 2¹ = 77726963 is a prime.

It is a super-2 number, since 2×77726965² = 12082962176222450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77726963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7772692 + ... + 7772701.

It is an arithmetic number, because the mean of its divisors is an integer number (23318091).

Almost surely, 2^77726965 is an apocalyptic number.

It is an amenable number.

77726965 is a deficient number, since it is larger than the sum of its proper divisors (15545399).

77726965 is a wasteful number, since it uses less digits than its factorization.

77726965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15545398.

The product of its digits is 1111320, while the sum is 49.

The square root of 77726965 is about 8816.2897524979. The cubic root of 77726965 is about 426.7667445770.

The spelling of 77726965 in words is "seventy-seven million, seven hundred twenty-six thousand, nine hundred sixty-five".