78057373 has 2 divisors, whose sum is σ = 78057374. Its totient is φ = 78057372.

The previous prime is 78057347. The next prime is 78057379. The reversal of 78057373 is 37375087.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77475204 + 582169 = 8802^2 + 763^2 .

It is an emirp because it is prime and its reverse (37375087) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78057373 - 2⁹ = 78056861 is a prime.

It is a super-2 number, since 2×78057373² = 12185906959322258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78057379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39028686 + 39028687.

It is an arithmetic number, because the mean of its divisors is an integer number (39028687).

Almost surely, 2^78057373 is an apocalyptic number.

It is an amenable number.

78057373 is a deficient number, since it is larger than the sum of its proper divisors (1).

78057373 is an equidigital number, since it uses as much as digits as its factorization.

78057373 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 123480, while the sum is 40.

The square root of 78057373 is about 8835.0083757742. The cubic root of 78057373 is about 427.3706011475.

The spelling of 78057373 in words is "seventy-eight million, fifty-seven thousand, three hundred seventy-three".