47076921 has 12 divisors (see below), whose sum is σ = 68435172. Its totient is φ = 31183776.

The previous prime is 47076919. The next prime is 47076923. The reversal of 47076921 is 12967074.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (47076919) and next prime (47076923).

It can be written as a sum of positive squares in 2 ways, for example, as 14175225 + 32901696 = 3765^2 + 5736^2 .

It is not a de Polignac number, because 47076921 - 2¹ = 47076919 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47076923) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15246 + ... + 18071.

It is an arithmetic number, because the mean of its divisors is an integer number (5702931).

Almost surely, 2^47076921 is an apocalyptic number.

It is an amenable number.

47076921 is a deficient number, since it is larger than the sum of its proper divisors (21358251).

47076921 is a wasteful number, since it uses less digits than its factorization.

47076921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33480 (or 33477 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 47076921 is about 6861.2623474110. The cubic root of 47076921 is about 361.0793762478.

It can be divided in two parts, 4707 and 6921, that added together give a triangular number (11628 = T₁₅₂).

The spelling of 47076921 in words is "forty-seven million, seventy-six thousand, nine hundred twenty-one".