78478601 has 2 divisors, whose sum is σ = 78478602. Its totient is φ = 78478600.

The previous prime is 78478571. The next prime is 78478627. The reversal of 78478601 is 10687487.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45427600 + 33051001 = 6740^2 + 5749^2 .

It is a cyclic number.

It is not a de Polignac number, because 78478601 - 2⁶ = 78478537 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (78478651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39239300 + 39239301.

It is an arithmetic number, because the mean of its divisors is an integer number (39239301).

Almost surely, 2^78478601 is an apocalyptic number.

It is an amenable number.

78478601 is a deficient number, since it is larger than the sum of its proper divisors (1).

78478601 is an equidigital number, since it uses as much as digits as its factorization.

78478601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75264, while the sum is 41.

The square root of 78478601 is about 8858.8148755914. The cubic root of 78478601 is about 428.1379752119.

The spelling of 78478601 in words is "seventy-eight million, four hundred seventy-eight thousand, six hundred one".