78100997 has 8 divisors (see below), whose sum is σ = 86822400. Its totient is φ = 69767280.

The previous prime is 78100993. The next prime is 78100999. The reversal of 78100997 is 79900187.

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

It is a cyclic number.

It is not a de Polignac number, because 78100997 - 2² = 78100993 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78100993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96497 + ... + 97302.

It is an arithmetic number, because the mean of its divisors is an integer number (10852800).

Almost surely, 2^78100997 is an apocalyptic number.

It is an amenable number.

78100997 is a deficient number, since it is larger than the sum of its proper divisors (8721403).

78100997 is a wasteful number, since it uses less digits than its factorization.

78100997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193843.

The product of its (nonzero) digits is 31752, while the sum is 41.

The square root of 78100997 is about 8837.4768457971. The cubic root of 78100997 is about 427.4502013285.

It can be divided in two parts, 78100 and 997, that added together give a palindrome (79097).

The spelling of 78100997 in words is "seventy-eight million, one hundred thousand, nine hundred ninety-seven".