73497409 has 4 divisors (see below), whose sum is σ = 77820804. Its totient is φ = 69174016.

The previous prime is 73497383. The next prime is 73497427. The reversal of 73497409 is 90479437.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90479437 = 1033 ⋅87589.

It can be written as a sum of positive squares in 2 ways, for example, as 56250000 + 17247409 = 7500^2 + 4153^2 .

It is a cyclic number.

It is not a de Polignac number, because 73497409 - 2¹⁵ = 73464641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73497499) 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, 2161672 + ... + 2161705.

It is an arithmetic number, because the mean of its divisors is an integer number (19455201).

Almost surely, 2^73497409 is an apocalyptic number.

It is an amenable number.

73497409 is a deficient number, since it is larger than the sum of its proper divisors (4323395).

73497409 is a wasteful number, since it uses less digits than its factorization.

73497409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4323394.

The product of its (nonzero) digits is 190512, while the sum is 43.

The square root of 73497409 is about 8573.0629882207. The cubic root of 73497409 is about 418.8810142069.

The spelling of 73497409 in words is "seventy-three million, four hundred ninety-seven thousand, four hundred nine".