78589901 has 12 divisors (see below), whose sum is σ = 85698900. Its totient is φ = 72034560.

The previous prime is 78589879. The next prime is 78589943. The reversal of 78589901 is 10998587.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 54834025 + 23755876 = 7405^2 + 4874^2 .

It is not a de Polignac number, because 78589901 - 2²² = 74395597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78589201) 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 11 ways as a sum of consecutive naturals, for example, 23621 + ... + 26741.

It is an arithmetic number, because the mean of its divisors is an integer number (7141575).

Almost surely, 2^78589901 is an apocalyptic number.

It is an amenable number.

78589901 is a deficient number, since it is larger than the sum of its proper divisors (7108999).

78589901 is a wasteful number, since it uses less digits than its factorization.

78589901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3296 (or 3283 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 47.

The square root of 78589901 is about 8865.0945285428. The cubic root of 78589901 is about 428.3402776946.

The spelling of 78589901 in words is "seventy-eight million, five hundred eighty-nine thousand, nine hundred one".