78069701 has 2 divisors, whose sum is σ = 78069702. Its totient is φ = 78069700.

The previous prime is 78069623. The next prime is 78069703. The reversal of 78069701 is 10796087.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64416676 + 13653025 = 8026^2 + 3695^2 .

It is an emirp because it is prime and its reverse (10796087) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78069701 - 2¹⁴ = 78053317 is a prime.

Together with 78069703, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78069703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39034850 + 39034851.

It is an arithmetic number, because the mean of its divisors is an integer number (39034851).

Almost surely, 2^78069701 is an apocalyptic number.

It is an amenable number.

78069701 is a deficient number, since it is larger than the sum of its proper divisors (1).

78069701 is an equidigital number, since it uses as much as digits as its factorization.

78069701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 38.

The square root of 78069701 is about 8835.7060272510. The cubic root of 78069701 is about 427.3930989045.

The spelling of 78069701 in words is "seventy-eight million, sixty-nine thousand, seven hundred one".