78960591 has 24 divisors (see below), whose sum is σ = 119676960. Its totient is φ = 50097600.

The previous prime is 78960589. The next prime is 78960593. The reversal of 78960591 is 19506987.

It is an interprime number because it is at equal distance from previous prime (78960589) and next prime (78960593).

It is not a de Polignac number, because 78960591 - 2¹ = 78960589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78960593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16401 + ... + 20661.

It is an arithmetic number, because the mean of its divisors is an integer number (4986540).

Almost surely, 2^78960591 is an apocalyptic number.

78960591 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

78960591 is a deficient number, since it is larger than the sum of its proper divisors (40716369).

78960591 is a wasteful number, since it uses less digits than its factorization.

78960591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4367 (or 4364 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The square root of 78960591 is about 8885.9772113145. The cubic root of 78960591 is about 429.0126815819.

The spelling of 78960591 in words is "seventy-eight million, nine hundred sixty thousand, five hundred ninety-one".