78751073 has 2 divisors, whose sum is σ = 78751074. Its totient is φ = 78751072.

The previous prime is 78751069. The next prime is 78751081. The reversal of 78751073 is 37015787.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42667024 + 36084049 = 6532^2 + 6007^2 .

It is a cyclic number.

It is not a de Polignac number, because 78751073 - 2² = 78751069 is a prime.

It is not a weakly prime, because it can be changed into another prime (78751033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39375536 + 39375537.

It is an arithmetic number, because the mean of its divisors is an integer number (39375537).

Almost surely, 2^78751073 is an apocalyptic number.

It is an amenable number.

78751073 is a deficient number, since it is larger than the sum of its proper divisors (1).

78751073 is an equidigital number, since it uses as much as digits as its factorization.

78751073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41160, while the sum is 38.

The square root of 78751073 is about 8874.1801311445. The cubic root of 78751073 is about 428.6328908624.

The spelling of 78751073 in words is "seventy-eight million, seven hundred fifty-one thousand, seventy-three".