73423121 has 4 divisors (see below), whose sum is σ = 73623552. Its totient is φ = 73222692.

The previous prime is 73423117. The next prime is 73423123. The reversal of 73423121 is 12132437.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12132437 = 127 ⋅95531.

It is a cyclic number.

It is not a de Polignac number, because 73423121 - 2² = 73423117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (73423123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99665 + ... + 100398.

It is an arithmetic number, because the mean of its divisors is an integer number (18405888).

Almost surely, 2^73423121 is an apocalyptic number.

It is an amenable number.

73423121 is a deficient number, since it is larger than the sum of its proper divisors (200431).

73423121 is a wasteful number, since it uses less digits than its factorization.

73423121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200430.

The product of its digits is 1008, while the sum is 23.

The square root of 73423121 is about 8568.7292523454. The cubic root of 73423121 is about 418.7398376980.

Adding to 73423121 its reverse (12132437), we get a palindrome (85555558).

The spelling of 73423121 in words is "seventy-three million, four hundred twenty-three thousand, one hundred twenty-one".