47761921 has 3 divisors (see below), whose sum is σ = 47768833. Its totient is φ = 47755010.

The previous prime is 47761919. The next prime is 47761933. The reversal of 47761921 is 12916774.

The square root of 47761921 is 6911.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 47761921 - 2¹ = 47761919 is a prime.

It is a super-2 number, since 2×47761921² = 4562402195220482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47761951) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 3456 + ... + 10366.

Almost surely, 2^47761921 is an apocalyptic number.

47761921 is the 6911-st square number.

47761921 is the 3456-th centered octagonal number.

It is an amenable number.

47761921 is a deficient number, since it is larger than the sum of its proper divisors (6912).

47761921 is an frugal number, since it uses more digits than its factorization.

47761921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13822 (or 6911 counting only the distinct ones).

The product of its digits is 21168, while the sum is 37.

The cubic root of 47761921 is about 362.8222637188.

The spelling of 47761921 in words is "forty-seven million, seven hundred sixty-one thousand, nine hundred twenty-one".