47665261 has 4 divisors (see below), whose sum is σ = 54474592. Its totient is φ = 40855932.

The previous prime is 47665231. The next prime is 47665271. The reversal of 47665261 is 16256674.

It is a happy number.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47665261 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 47665261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47665201) 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, 3404655 + ... + 3404668.

It is an arithmetic number, because the mean of its divisors is an integer number (13618648).

Almost surely, 2^47665261 is an apocalyptic number.

It is an amenable number.

47665261 is a deficient number, since it is larger than the sum of its proper divisors (6809331).

47665261 is an equidigital number, since it uses as much as digits as its factorization.

47665261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6809330.

The product of its digits is 60480, while the sum is 37.

The square root of 47665261 is about 6904.0032589795. The cubic root of 47665261 is about 362.5773399786.

The spelling of 47665261 in words is "forty-seven million, six hundred sixty-five thousand, two hundred sixty-one".