47665405 has 4 divisors (see below), whose sum is σ = 57198492. Its totient is φ = 38132320.

The previous prime is 47665381. The next prime is 47665417. The reversal of 47665405 is 50456674.

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: 50456674 = 2 ⋅25228337.

It can be written as a sum of positive squares in 2 ways, for example, as 24423364 + 23242041 = 4942^2 + 4821^2 .

It is not a de Polignac number, because 47665405 - 2¹³ = 47657213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4766536 + ... + 4766545.

It is an arithmetic number, because the mean of its divisors is an integer number (14299623).

Almost surely, 2^47665405 is an apocalyptic number.

It is an amenable number.

47665405 is a deficient number, since it is larger than the sum of its proper divisors (9533087).

47665405 is an equidigital number, since it uses as much as digits as its factorization.

47665405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9533086.

The product of its (nonzero) digits is 100800, while the sum is 37.

The square root of 47665405 is about 6904.0136877037. The cubic root of 47665405 is about 362.5777051018.

The spelling of 47665405 in words is "forty-seven million, six hundred sixty-five thousand, four hundred five".