78121795 has 8 divisors (see below), whose sum is σ = 96978960. Its totient is φ = 60342240.

The previous prime is 78121793. The next prime is 78121811. The reversal of 78121795 is 59712187.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 78121795 - 2¹ = 78121793 is a prime.

It is a super-2 number, since 2×78121795² = 12206029708044050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78121793) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 269241 + ... + 269530.

It is an arithmetic number, because the mean of its divisors is an integer number (12122370).

Almost surely, 2^78121795 is an apocalyptic number.

78121795 is a deficient number, since it is larger than the sum of its proper divisors (18857165).

78121795 is a wasteful number, since it uses less digits than its factorization.

78121795 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538805.

The product of its digits is 35280, while the sum is 40.

The square root of 78121795 is about 8838.6534607937. The cubic root of 78121795 is about 427.4881407515.

The spelling of 78121795 in words is "seventy-eight million, one hundred twenty-one thousand, seven hundred ninety-five".