77230209 has 16 divisors (see below), whose sum is σ = 119615360. Its totient is φ = 43407360.

The previous prime is 77230157. The next prime is 77230217. The reversal of 77230209 is 90203277.

It is not a de Polignac number, because 77230209 - 2⁷ = 77230081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77230229) 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, 28864 + ... + 31425.

It is an arithmetic number, because the mean of its divisors is an integer number (7475960).

Almost surely, 2^77230209 is an apocalyptic number.

It is an amenable number.

77230209 is a deficient number, since it is larger than the sum of its proper divisors (42385151).

77230209 is a wasteful number, since it uses less digits than its factorization.

77230209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60360.

The product of its (nonzero) digits is 5292, while the sum is 30.

The square root of 77230209 is about 8788.0719728505. The cubic root of 77230209 is about 425.8556399923.

The spelling of 77230209 in words is "seventy-seven million, two hundred thirty thousand, two hundred nine".