77079121 has 4 divisors (see below), whose sum is σ = 88090432. Its totient is φ = 66067812.

The previous prime is 77079109. The next prime is 77079127. The reversal of 77079121 is 12197077.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12197077 = 829 ⋅14713.

It is a cyclic number.

It is not a de Polignac number, because 77079121 - 2⁵ = 77079089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77079127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5505645 + ... + 5505658.

It is an arithmetic number, because the mean of its divisors is an integer number (22022608).

Almost surely, 2^77079121 is an apocalyptic number.

It is an amenable number.

77079121 is a deficient number, since it is larger than the sum of its proper divisors (11011311).

77079121 is a wasteful number, since it uses less digits than its factorization.

77079121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11011310.

The product of its (nonzero) digits is 6174, while the sum is 34.

The square root of 77079121 is about 8779.4715672414. The cubic root of 77079121 is about 425.5777535653.

The spelling of 77079121 in words is "seventy-seven million, seventy-nine thousand, one hundred twenty-one".