77230121 has 4 divisors (see below), whose sum is σ = 77980032. Its totient is φ = 76480212.

The previous prime is 77230091. The next prime is 77230123. The reversal of 77230121 is 12103277.

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 77230121 - 2¹⁸ = 76967977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77230123) 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, 374801 + ... + 375006.

It is an arithmetic number, because the mean of its divisors is an integer number (19495008).

Almost surely, 2^77230121 is an apocalyptic number.

It is an amenable number.

77230121 is a deficient number, since it is larger than the sum of its proper divisors (749911).

77230121 is a wasteful number, since it uses less digits than its factorization.

77230121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 749910.

The product of its (nonzero) digits is 588, while the sum is 23.

The square root of 77230121 is about 8788.0669660626. The cubic root of 77230121 is about 425.8554782451.

Adding to 77230121 its reverse (12103277), we get a palindrome (89333398).

The spelling of 77230121 in words is "seventy-seven million, two hundred thirty thousand, one hundred twenty-one".