78037481 has 2 divisors, whose sum is σ = 78037482. Its totient is φ = 78037480.

The previous prime is 78037457. The next prime is 78037489. The reversal of 78037481 is 18473087.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47886400 + 30151081 = 6920^2 + 5491^2 .

It is a cyclic number.

It is not a de Polignac number, because 78037481 - 2⁶ = 78037417 is a prime.

It is a super-2 number, since 2×78037481² = 12179696881650722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (78037489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39018740 + 39018741.

It is an arithmetic number, because the mean of its divisors is an integer number (39018741).

Almost surely, 2^78037481 is an apocalyptic number.

It is an amenable number.

78037481 is a deficient number, since it is larger than the sum of its proper divisors (1).

78037481 is an equidigital number, since it uses as much as digits as its factorization.

78037481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37632, while the sum is 38.

The square root of 78037481 is about 8833.8825552528. The cubic root of 78037481 is about 427.3342946125.

The spelling of 78037481 in words is "seventy-eight million, thirty-seven thousand, four hundred eighty-one".