78541633 has 2 divisors, whose sum is σ = 78541634. Its totient is φ = 78541632.

The previous prime is 78541627. The next prime is 78541663. The reversal of 78541633 is 33614587.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63888049 + 14653584 = 7993^2 + 3828^2 .

It is an emirp because it is prime and its reverse (33614587) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78541633 is a prime.

It is a super-2 number, since 2×78541633² = 12337576228613378, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78541592 and 78541601.

It is not a weakly prime, because it can be changed into another prime (78541663) 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, 39270816 + 39270817.

It is an arithmetic number, because the mean of its divisors is an integer number (39270817).

Almost surely, 2^78541633 is an apocalyptic number.

It is an amenable number.

78541633 is a deficient number, since it is larger than the sum of its proper divisors (1).

78541633 is an equidigital number, since it uses as much as digits as its factorization.

78541633 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 37.

The square root of 78541633 is about 8862.3717480142. The cubic root of 78541633 is about 428.2525676860.

The spelling of 78541633 in words is "seventy-eight million, five hundred forty-one thousand, six hundred thirty-three".