47621661 has 16 divisors (see below), whose sum is σ = 66416640. Its totient is φ = 30294000.

The previous prime is 47621659. The next prime is 47621671. The reversal of 47621661 is 16612674.

It is not a de Polignac number, because 47621661 - 2¹ = 47621659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47621671) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51360 + ... + 52278.

It is an arithmetic number, because the mean of its divisors is an integer number (4151040).

Almost surely, 2^47621661 is an apocalyptic number.

It is an amenable number.

47621661 is a deficient number, since it is larger than the sum of its proper divisors (18794979).

47621661 is a wasteful number, since it uses less digits than its factorization.

47621661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1696.

The product of its digits is 12096, while the sum is 33.

The square root of 47621661 is about 6900.8449482654. The cubic root of 47621661 is about 362.4667549377.

The spelling of 47621661 in words is "forty-seven million, six hundred twenty-one thousand, six hundred sixty-one".