78121096 has 16 divisors (see below), whose sum is σ = 148484700. Its totient is φ = 38525184.

The previous prime is 78121093. The next prime is 78121111. The reversal of 78121096 is 69012187.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 75516100 + 2604996 = 8690^2 + 1614^2 .

It is a super-2 number, since 2×78121096² = 12205811280482432, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (78121093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66301 + ... + 67468.

Almost surely, 2^78121096 is an apocalyptic number.

It is an amenable number.

78121096 is a deficient number, since it is larger than the sum of its proper divisors (70363604).

78121096 is a wasteful number, since it uses less digits than its factorization.

78121096 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133848 (or 133844 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 78121096 is about 8838.6139184829. The cubic root of 78121096 is about 427.4868657547.

The spelling of 78121096 in words is "seventy-eight million, one hundred twenty-one thousand, ninety-six".