77722369 has 4 divisors (see below), whose sum is σ = 81813040. Its totient is φ = 73631700.

The previous prime is 77722367. The next prime is 77722373. The reversal of 77722369 is 96322777.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 77722369 - 2¹ = 77722367 is a prime.

It is a super-2 number, since 2×77722369² = 12081533285944322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77722367) 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, 2045307 + ... + 2045344.

It is an arithmetic number, because the mean of its divisors is an integer number (20453260).

Almost surely, 2^77722369 is an apocalyptic number.

It is an amenable number.

77722369 is a deficient number, since it is larger than the sum of its proper divisors (4090671).

77722369 is a wasteful number, since it uses less digits than its factorization.

77722369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4090670.

The product of its digits is 222264, while the sum is 43.

The square root of 77722369 is about 8816.0290947796. The cubic root of 77722369 is about 426.7583328303.

The spelling of 77722369 in words is "seventy-seven million, seven hundred twenty-two thousand, three hundred sixty-nine".