78285071 has 2 divisors, whose sum is σ = 78285072. Its totient is φ = 78285070.

The previous prime is 78285061. The next prime is 78285121. The reversal of 78285071 is 17058287.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78285071 is a prime.

It is a super-2 number, since 2×78285071² = 12257104682950082, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78285001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39142535 + 39142536.

It is an arithmetic number, because the mean of its divisors is an integer number (39142536).

Almost surely, 2^78285071 is an apocalyptic number.

78285071 is a deficient number, since it is larger than the sum of its proper divisors (1).

78285071 is an equidigital number, since it uses as much as digits as its factorization.

78285071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31360, while the sum is 38.

The square root of 78285071 is about 8847.8851145344. The cubic root of 78285071 is about 427.7857528894.

The spelling of 78285071 in words is "seventy-eight million, two hundred eighty-five thousand, seventy-one".