47077661 has 4 divisors (see below), whose sum is σ = 47151072. Its totient is φ = 47004252.

The previous prime is 47077651. The next prime is 47077669. The reversal of 47077661 is 16677074.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16677074 = 2 ⋅8338537.

It is a cyclic number.

It is not a de Polignac number, because 47077661 - 2¹⁰ = 47076637 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 (47077669) 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, 35735 + ... + 37028.

It is an arithmetic number, because the mean of its divisors is an integer number (11787768).

Almost surely, 2^47077661 is an apocalyptic number.

It is an amenable number.

47077661 is a deficient number, since it is larger than the sum of its proper divisors (73411).

47077661 is an equidigital number, since it uses as much as digits as its factorization.

47077661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73410.

The product of its (nonzero) digits is 49392, while the sum is 38.

The square root of 47077661 is about 6861.3162731359. The cubic root of 47077661 is about 361.0812681680.

The spelling of 47077661 in words is "forty-seven million, seventy-seven thousand, six hundred sixty-one".