73280401 has 2 divisors, whose sum is σ = 73280402. Its totient is φ = 73280400.

The previous prime is 73280371. The next prime is 73280411. The reversal of 73280401 is 10408237.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70308225 + 2972176 = 8385^2 + 1724^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73280401 is a prime.

It is a plaindrome in base 13.

It is not a weakly prime, because it can be changed into another prime (73280411) 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, 36640200 + 36640201.

It is an arithmetic number, because the mean of its divisors is an integer number (36640201).

Almost surely, 2^73280401 is an apocalyptic number.

It is an amenable number.

73280401 is a deficient number, since it is larger than the sum of its proper divisors (1).

73280401 is an equidigital number, since it uses as much as digits as its factorization.

73280401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 73280401 is about 8560.3972454554. The cubic root of 73280401 is about 418.4683459532.

Adding to 73280401 its reverse (10408237), we get a palindrome (83688638).

The spelling of 73280401 in words is "seventy-three million, two hundred eighty thousand, four hundred one".