77469221 has 16 divisors (see below), whose sum is σ = 86054400. Its totient is φ = 69366528.

The previous prime is 77469193. The next prime is 77469239. The reversal of 77469221 is 12296477.

It is not a de Polignac number, because 77469221 - 2¹⁰ = 77468197 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 (77469281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93035 + ... + 93863.

It is an arithmetic number, because the mean of its divisors is an integer number (5378400).

Almost surely, 2^77469221 is an apocalyptic number.

It is an amenable number.

77469221 is a deficient number, since it is larger than the sum of its proper divisors (8585179).

77469221 is a wasteful number, since it uses less digits than its factorization.

77469221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1108.

The product of its digits is 42336, while the sum is 38.

The square root of 77469221 is about 8801.6601274987. The cubic root of 77469221 is about 426.2945001599.

The spelling of 77469221 in words is "seventy-seven million, four hundred sixty-nine thousand, two hundred twenty-one".