73427405 has 4 divisors (see below), whose sum is σ = 88112892. Its totient is φ = 58741920.

The previous prime is 73427401. The next prime is 73427407. The reversal of 73427405 is 50472437.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50472437 = 61 ⋅827417.

It can be written as a sum of positive squares in 2 ways, for example, as 18267076 + 55160329 = 4274^2 + 7427^2 .

It is not a de Polignac number, because 73427405 - 2² = 73427401 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73427401) 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, 7342736 + ... + 7342745.

It is an arithmetic number, because the mean of its divisors is an integer number (22028223).

Almost surely, 2^73427405 is an apocalyptic number.

It is an amenable number.

73427405 is a deficient number, since it is larger than the sum of its proper divisors (14685487).

73427405 is a wasteful number, since it uses less digits than its factorization.

73427405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14685486.

The product of its (nonzero) digits is 23520, while the sum is 32.

The square root of 73427405 is about 8568.9792274226. The cubic root of 73427405 is about 418.7479815749.

The spelling of 73427405 in words is "seventy-three million, four hundred twenty-seven thousand, four hundred five".