78059987 has 2 divisors, whose sum is σ = 78059988. Its totient is φ = 78059986.

The previous prime is 78059983. The next prime is 78060013. The reversal of 78059987 is 78995087.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78059987 - 2² = 78059983 is a prime.

It is not a weakly prime, because it can be changed into another prime (78059983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39029993 + 39029994.

It is an arithmetic number, because the mean of its divisors is an integer number (39029994).

Almost surely, 2^78059987 is an apocalyptic number.

78059987 is a deficient number, since it is larger than the sum of its proper divisors (1).

78059987 is an equidigital number, since it uses as much as digits as its factorization.

78059987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1270080, while the sum is 53.

The square root of 78059987 is about 8835.1563087475. The cubic root of 78059987 is about 427.3753717167.

The spelling of 78059987 in words is "seventy-eight million, fifty-nine thousand, nine hundred eighty-seven".