78888961 has 16 divisors (see below), whose sum is σ = 85599360. Its totient is φ = 72535680.

The previous prime is 78888941. The next prime is 78888967. The reversal of 78888961 is 16988887.

It is a cyclic number.

It is not a de Polignac number, because 78888961 - 2¹⁹ = 78364673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78888967) 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, 50356 + ... + 51898.

It is an arithmetic number, because the mean of its divisors is an integer number (5349960).

It is a Proth number, since it is equal to 4815 ⋅ 2¹⁴ + 1 and 4815 < 2¹⁴.

Almost surely, 2^78888961 is an apocalyptic number.

It is an amenable number.

78888961 is a deficient number, since it is larger than the sum of its proper divisors (6710399).

78888961 is a wasteful number, since it uses less digits than its factorization.

78888961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1656.

The product of its digits is 1548288, while the sum is 55.

The square root of 78888961 is about 8881.9457890712. The cubic root of 78888961 is about 428.8829144196.

The spelling of 78888961 in words is "seventy-eight million, eight hundred eighty-eight thousand, nine hundred sixty-one".