73470121 has 2 divisors, whose sum is σ = 73470122. Its totient is φ = 73470120.

The previous prime is 73470113. The next prime is 73470143. The reversal of 73470121 is 12107437.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69222400 + 4247721 = 8320^2 + 2061^2 .

It is an emirp because it is prime and its reverse (12107437) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 73470121 - 2³ = 73470113 is a prime.

It is not a weakly prime, because it can be changed into another prime (73470151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36735060 + 36735061.

It is an arithmetic number, because the mean of its divisors is an integer number (36735061).

Almost surely, 2^73470121 is an apocalyptic number.

It is an amenable number.

73470121 is a deficient number, since it is larger than the sum of its proper divisors (1).

73470121 is an equidigital number, since it uses as much as digits as its factorization.

73470121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 73470121 is about 8571.4713439409. The cubic root of 73470121 is about 418.8291672998.

Adding to 73470121 its reverse (12107437), we get a palindrome (85577558).

The spelling of 73470121 in words is "seventy-three million, four hundred seventy thousand, one hundred twenty-one".