78370541 has 2 divisors, whose sum is σ = 78370542. Its totient is φ = 78370540.

The previous prime is 78370531. The next prime is 78370559. The reversal of 78370541 is 14507387.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52258441 + 26112100 = 7229^2 + 5110^2 .

It is an emirp because it is prime and its reverse (14507387) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78370541 - 2¹⁰ = 78369517 is a prime.

It is a super-2 number, since 2×78370541² = 12283883393265362, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78370531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39185270 + 39185271.

It is an arithmetic number, because the mean of its divisors is an integer number (39185271).

Almost surely, 2^78370541 is an apocalyptic number.

It is an amenable number.

78370541 is a deficient number, since it is larger than the sum of its proper divisors (1).

78370541 is an equidigital number, since it uses as much as digits as its factorization.

78370541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23520, while the sum is 35.

The square root of 78370541 is about 8852.7137647164. The cubic root of 78370541 is about 427.9413787736.

The spelling of 78370541 in words is "seventy-eight million, three hundred seventy thousand, five hundred forty-one".