78069623 has 2 divisors, whose sum is σ = 78069624. Its totient is φ = 78069622.

The previous prime is 78069619. The next prime is 78069701. The reversal of 78069623 is 32696087.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78069623 - 2² = 78069619 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78069323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39034811 + 39034812.

It is an arithmetic number, because the mean of its divisors is an integer number (39034812).

Almost surely, 2^78069623 is an apocalyptic number.

78069623 is a deficient number, since it is larger than the sum of its proper divisors (1).

78069623 is an equidigital number, since it uses as much as digits as its factorization.

78069623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 78069623 is about 8835.7016133412. The cubic root of 78069623 is about 427.3929565673.

The spelling of 78069623 in words is "seventy-eight million, sixty-nine thousand, six hundred twenty-three".