78997413 has 16 divisors (see below), whose sum is σ = 115108416. Its totient is φ = 47792640.

The previous prime is 78997357. The next prime is 78997417. The reversal of 78997413 is 31479987.

It is not a de Polignac number, because 78997413 - 2⁹ = 78996901 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78997417) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20431 + ... + 23987.

It is an arithmetic number, because the mean of its divisors is an integer number (7194276).

Almost surely, 2^78997413 is an apocalyptic number.

It is an amenable number.

78997413 is a deficient number, since it is larger than the sum of its proper divisors (36111003).

78997413 is a wasteful number, since it uses less digits than its factorization.

78997413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4244.

The product of its digits is 381024, while the sum is 48.

The square root of 78997413 is about 8888.0488860042. The cubic root of 78997413 is about 429.0793589366.

It can be divided in two parts, 789974 and 13, that added together give a palindrome (789987).

The spelling of 78997413 in words is "seventy-eight million, nine hundred ninety-seven thousand, four hundred thirteen".