78047933 has 2 divisors, whose sum is σ = 78047934. Its totient is φ = 78047932.

The previous prime is 78047923. The next prime is 78047939. The reversal of 78047933 is 33974087.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43731769 + 34316164 = 6613^2 + 5858^2 .

It is a cyclic number.

It is not a de Polignac number, because 78047933 - 2⁶ = 78047869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78047939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39023966 + 39023967.

It is an arithmetic number, because the mean of its divisors is an integer number (39023967).

Almost surely, 2^78047933 is an apocalyptic number.

It is an amenable number.

78047933 is a deficient number, since it is larger than the sum of its proper divisors (1).

78047933 is an equidigital number, since it uses as much as digits as its factorization.

78047933 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 127008, while the sum is 41.

The square root of 78047933 is about 8834.4741213046. The cubic root of 78047933 is about 427.3533721916.

The spelling of 78047933 in words is "seventy-eight million, forty-seven thousand, nine hundred thirty-three".