78484577 has 2 divisors, whose sum is σ = 78484578. Its totient is φ = 78484576.

The previous prime is 78484547. The next prime is 78484633. The reversal of 78484577 is 77548487.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78304801 + 179776 = 8849^2 + 424^2 .

It is a cyclic number.

It is not a de Polignac number, because 78484577 - 2²² = 74290273 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (78484507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39242288 + 39242289.

It is an arithmetic number, because the mean of its divisors is an integer number (39242289).

Almost surely, 2^78484577 is an apocalyptic number.

It is an amenable number.

78484577 is a deficient number, since it is larger than the sum of its proper divisors (1).

78484577 is an equidigital number, since it uses as much as digits as its factorization.

78484577 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1756160, while the sum is 50.

The square root of 78484577 is about 8859.1521603368. The cubic root of 78484577 is about 428.1488422405.

The spelling of 78484577 in words is "seventy-eight million, four hundred eighty-four thousand, five hundred seventy-seven".