77722741 has 4 divisors (see below), whose sum is σ = 78045484. Its totient is φ = 77400000.

The previous prime is 77722739. The next prime is 77722763. The reversal of 77722741 is 14722777.

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 32160241 + 45562500 = 5671^2 + 6750^2 .

It is a cyclic number.

It is not a de Polignac number, because 77722741 - 2¹ = 77722739 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 77722741.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77722781) 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, 161010 + ... + 161491.

It is an arithmetic number, because the mean of its divisors is an integer number (19511371).

Almost surely, 2^77722741 is an apocalyptic number.

It is an amenable number.

77722741 is a deficient number, since it is larger than the sum of its proper divisors (322743).

77722741 is a wasteful number, since it uses less digits than its factorization.

77722741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322742.

The product of its digits is 38416, while the sum is 37.

The square root of 77722741 is about 8816.0501926883. The cubic root of 77722741 is about 426.7590136890.

The spelling of 77722741 in words is "seventy-seven million, seven hundred twenty-two thousand, seven hundred forty-one".