77297121 has 24 divisors (see below), whose sum is σ = 122956704. Its totient is φ = 46402560.

The previous prime is 77297083. The next prime is 77297189. The reversal of 77297121 is 12179277.

It is not a de Polignac number, because 77297121 - 2⁶ = 77297057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77297191) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6945 + ... + 14241.

It is an arithmetic number, because the mean of its divisors is an integer number (5123196).

Almost surely, 2^77297121 is an apocalyptic number.

It is an amenable number.

77297121 is a deficient number, since it is larger than the sum of its proper divisors (45659583).

77297121 is a wasteful number, since it uses less digits than its factorization.

77297121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7421 (or 7418 counting only the distinct ones).

The product of its digits is 12348, while the sum is 36.

The square root of 77297121 is about 8791.8781269988. The cubic root of 77297121 is about 425.9785911346.

The spelling of 77297121 in words is "seventy-seven million, two hundred ninety-seven thousand, one hundred twenty-one".