78150773 has 2 divisors, whose sum is σ = 78150774. Its totient is φ = 78150772.

The previous prime is 78150769. The next prime is 78150799. The reversal of 78150773 is 37705187.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52678564 + 25472209 = 7258^2 + 5047^2 .

It is a cyclic number.

It is not a de Polignac number, because 78150773 - 2² = 78150769 is a prime.

It is a super-2 number, since 2×78150773² = 12215086640995058, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78150703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39075386 + 39075387.

It is an arithmetic number, because the mean of its divisors is an integer number (39075387).

Almost surely, 2^78150773 is an apocalyptic number.

It is an amenable number.

78150773 is a deficient number, since it is larger than the sum of its proper divisors (1).

78150773 is an equidigital number, since it uses as much as digits as its factorization.

78150773 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 78150773 is about 8840.2925856557. The cubic root of 78150773 is about 427.5409907915.

The spelling of 78150773 in words is "seventy-eight million, one hundred fifty thousand, seven hundred seventy-three".