78954541 has 2 divisors, whose sum is σ = 78954542. Its totient is φ = 78954540.

The previous prime is 78954529. The next prime is 78954581. The reversal of 78954541 is 14545987.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73874025 + 5080516 = 8595^2 + 2254^2 .

It is a cyclic number.

It is not a de Polignac number, because 78954541 - 2⁵ = 78954509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78954521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39477270 + 39477271.

It is an arithmetic number, because the mean of its divisors is an integer number (39477271).

Almost surely, 2^78954541 is an apocalyptic number.

It is an amenable number.

78954541 is a deficient number, since it is larger than the sum of its proper divisors (1).

78954541 is an equidigital number, since it uses as much as digits as its factorization.

78954541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 201600, while the sum is 43.

The square root of 78954541 is about 8885.6367807828. The cubic root of 78954541 is about 429.0017242465.

The spelling of 78954541 in words is "seventy-eight million, nine hundred fifty-four thousand, five hundred forty-one".