78918741 has 18 divisors (see below), whose sum is σ = 125300630. Its totient is φ = 47828880.

The previous prime is 78918739. The next prime is 78918751. The reversal of 78918741 is 14781987.

It can be written as a sum of positive squares in only one way, i.e., 50339025 + 28579716 = 7095^2 + 5346^2 .

It is not a de Polignac number, because 78918741 - 2¹ = 78918739 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78918751) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 35146 + ... + 37323.

Almost surely, 2^78918741 is an apocalyptic number.

It is an amenable number.

78918741 is a deficient number, since it is larger than the sum of its proper divisors (46381889).

78918741 is a wasteful number, since it uses less digits than its factorization.

78918741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72497 (or 72483 counting only the distinct ones).

The product of its digits is 112896, while the sum is 45.

The square root of 78918741 is about 8883.6220653515. The cubic root of 78918741 is about 428.9368743410.

It can be divided in two parts, 78 and 918741, that added together give a palindrome (918819).

The spelling of 78918741 in words is "seventy-eight million, nine hundred eighteen thousand, seven hundred forty-one".