78896121 has 4 divisors (see below), whose sum is σ = 105194832. Its totient is φ = 52597412.

The previous prime is 78896117. The next prime is 78896159. The reversal of 78896121 is 12169887.

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 78896121 - 2² = 78896117 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78896101) 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, 13149351 + ... + 13149356.

It is an arithmetic number, because the mean of its divisors is an integer number (26298708).

Almost surely, 2^78896121 is an apocalyptic number.

It is an amenable number.

78896121 is a deficient number, since it is larger than the sum of its proper divisors (26298711).

78896121 is a wasteful number, since it uses less digits than its factorization.

78896121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26298710.

The product of its digits is 48384, while the sum is 42.

The square root of 78896121 is about 8882.3488447595. The cubic root of 78896121 is about 428.8958892335.

The spelling of 78896121 in words is "seventy-eight million, eight hundred ninety-six thousand, one hundred twenty-one".