78489601 has 4 divisors (see below), whose sum is σ = 78570432. Its totient is φ = 78408772.

The previous prime is 78489571. The next prime is 78489611. The reversal of 78489601 is 10698487.

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.

It is a cyclic number.

It is not a de Polignac number, because 78489601 - 2⁵ = 78489569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78489611) 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, 38941 + ... + 40906.

It is an arithmetic number, because the mean of its divisors is an integer number (19642608).

Almost surely, 2^78489601 is an apocalyptic number.

It is an amenable number.

78489601 is a deficient number, since it is larger than the sum of its proper divisors (80831).

78489601 is an equidigital number, since it uses as much as digits as its factorization.

78489601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80830.

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 78489601 is about 8859.4357043776. The cubic root of 78489601 is about 428.1579776824.

The spelling of 78489601 in words is "seventy-eight million, four hundred eighty-nine thousand, six hundred one".