78807061 has 4 divisors (see below), whose sum is σ = 78830752. Its totient is φ = 78783372.

The previous prime is 78807049. The next prime is 78807073. The reversal of 78807061 is 16070887.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16070887 = 7 ⋅2295841.

It is an interprime number because it is at equal distance from previous prime (78807049) and next prime (78807073).

It is a cyclic number.

It is not a de Polignac number, because 78807061 - 2⁷ = 78806933 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78807061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78807031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5841 + ... + 13846.

It is an arithmetic number, because the mean of its divisors is an integer number (19707688).

Almost surely, 2^78807061 is an apocalyptic number.

It is an amenable number.

78807061 is a deficient number, since it is larger than the sum of its proper divisors (23691).

78807061 is a wasteful number, since it uses less digits than its factorization.

78807061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23690.

The product of its (nonzero) digits is 18816, while the sum is 37.

The square root of 78807061 is about 8877.3341156002. The cubic root of 78807061 is about 428.7344455140.

It can be divided in two parts, 7880 and 7061, that added together give a palindrome (14941).

The spelling of 78807061 in words is "seventy-eight million, eight hundred seven thousand, sixty-one".